A temporal phase-truncated double random phase encoding cryptosystem in the temporal skew Fourier transform domain
A temporal phase-truncated double random phase encoding cryptosystem is proposed to be improved by replacing the temporal Fourier transformers (TFTs) of the dispersion-time lens-dispersion structure with temporal skew Fourier transformers (TSFTs). A TSFT is similar to a TFT except for the time lens...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Wang, Mingqing [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2021transfer abstract |
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| Schlagwörter: |
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| Übergeordnetes Werk: |
Enthalten in: Effect of hawthorn seed extract on the gastrointestinal function of rats with diabetic gastroparesis - Niu, Zhenzhen ELSEVIER, 2020, Amsterdam |
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| Übergeordnetes Werk: |
volume:483 ; year:2021 ; day:15 ; month:03 ; pages:0 |
| Links: |
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| DOI / URN: |
10.1016/j.optcom.2020.126635 |
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ELV052560929 |
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| 245 | 1 | 0 | |a A temporal phase-truncated double random phase encoding cryptosystem in the temporal skew Fourier transform domain |
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| 520 | |a A temporal phase-truncated double random phase encoding cryptosystem is proposed to be improved by replacing the temporal Fourier transformers (TFTs) of the dispersion-time lens-dispersion structure with temporal skew Fourier transformers (TSFTs). A TSFT is similar to a TFT except for the time lens (TL) replaced by a skew time lens (STL). A STL is a temporal analog of a spatial cylindrical lens with the in-plane rotational asymmetry mapping to a front–back asymmetry. The front–back asymmetry is achieved by adding the chirp factor C of a TL by + ϵ ⋅ C and − ϵ ⋅ C respectively along the positive and negative half axis of the local time coordinate. The skew coefficients ϵ 1 and ϵ 2 of the two TSFTs involved in the encryption stage are dimensionless and ideally unbounded, serving as additional secret keys. By mathematical analysis, STLs are proven to have complex-value modulations on low frequency components of input signals of TSFTs, which cannot be removed by phase truncations (PTs) in the legal decryption stage. The plain/cipher-text-independent and non-removability features of STLs make phase retrieval attacks unable to exempt eavesdroppers from brute-force trials of STLs. A STL is implemented by an electrical arbitrary waveform generator (AWG) driven electro-optic phase modulator (EOPM). By numerical simulations, the using of STLs is proven to increase the difficulty of phase retrieval attacks in terms of the time consuming required for convergence. Even if phase retrieval attacks converge, the plaintext signal cannot be recovered without the knowledge of ϵ 1 , 2 in the encryption stage. The total key space of ϵ 1 , 2 is also evaluated as 2 17 at AWG bandwidth B m = 20 GHz, and as 2 37 at B m = 100 GHz. The fidelity robustness of our optical cryptosystem against possible noise and occlusion penalties on the communication channels and networks of optical cipher-text signals is also proven. | ||
| 520 | |a A temporal phase-truncated double random phase encoding cryptosystem is proposed to be improved by replacing the temporal Fourier transformers (TFTs) of the dispersion-time lens-dispersion structure with temporal skew Fourier transformers (TSFTs). A TSFT is similar to a TFT except for the time lens (TL) replaced by a skew time lens (STL). A STL is a temporal analog of a spatial cylindrical lens with the in-plane rotational asymmetry mapping to a front–back asymmetry. The front–back asymmetry is achieved by adding the chirp factor C of a TL by + ϵ ⋅ C and − ϵ ⋅ C respectively along the positive and negative half axis of the local time coordinate. The skew coefficients ϵ 1 and ϵ 2 of the two TSFTs involved in the encryption stage are dimensionless and ideally unbounded, serving as additional secret keys. By mathematical analysis, STLs are proven to have complex-value modulations on low frequency components of input signals of TSFTs, which cannot be removed by phase truncations (PTs) in the legal decryption stage. The plain/cipher-text-independent and non-removability features of STLs make phase retrieval attacks unable to exempt eavesdroppers from brute-force trials of STLs. A STL is implemented by an electrical arbitrary waveform generator (AWG) driven electro-optic phase modulator (EOPM). By numerical simulations, the using of STLs is proven to increase the difficulty of phase retrieval attacks in terms of the time consuming required for convergence. Even if phase retrieval attacks converge, the plaintext signal cannot be recovered without the knowledge of ϵ 1 , 2 in the encryption stage. The total key space of ϵ 1 , 2 is also evaluated as 2 17 at AWG bandwidth B m = 20 GHz, and as 2 37 at B m = 100 GHz. The fidelity robustness of our optical cryptosystem against possible noise and occlusion penalties on the communication channels and networks of optical cipher-text signals is also proven. | ||
| 650 | 7 | |a Phase truncation |2 Elsevier | |
| 650 | 7 | |a Optical communications |2 Elsevier | |
| 650 | 7 | |a Cylindrical lens |2 Elsevier | |
| 650 | 7 | |a Double random phase encoding |2 Elsevier | |
| 650 | 7 | |a Phase retrieval attacks |2 Elsevier | |
| 650 | 7 | |a Optical encryption |2 Elsevier | |
| 700 | 1 | |a Lou, Shuqin |4 oth | |
| 773 | 0 | 8 | |i Enthalten in |a Niu, Zhenzhen ELSEVIER |t Effect of hawthorn seed extract on the gastrointestinal function of rats with diabetic gastroparesis |d 2020 |g Amsterdam |w (DE-627)ELV004103645 |
| 773 | 1 | 8 | |g volume:483 |g year:2021 |g day:15 |g month:03 |g pages:0 |
| 856 | 4 | 0 | |u https://doi.org/10.1016/j.optcom.2020.126635 |3 Volltext |
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10.1016/j.optcom.2020.126635 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001245.pica (DE-627)ELV052560929 (ELSEVIER)S0030-4018(20)31053-1 DE-627 ger DE-627 rakwb eng 580 VZ AFRIKA DE-30 fid BIODIV DE-30 fid 42.38 bkl Wang, Mingqing verfasserin aut A temporal phase-truncated double random phase encoding cryptosystem in the temporal skew Fourier transform domain 2021transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier A temporal phase-truncated double random phase encoding cryptosystem is proposed to be improved by replacing the temporal Fourier transformers (TFTs) of the dispersion-time lens-dispersion structure with temporal skew Fourier transformers (TSFTs). A TSFT is similar to a TFT except for the time lens (TL) replaced by a skew time lens (STL). A STL is a temporal analog of a spatial cylindrical lens with the in-plane rotational asymmetry mapping to a front–back asymmetry. The front–back asymmetry is achieved by adding the chirp factor C of a TL by + ϵ ⋅ C and − ϵ ⋅ C respectively along the positive and negative half axis of the local time coordinate. The skew coefficients ϵ 1 and ϵ 2 of the two TSFTs involved in the encryption stage are dimensionless and ideally unbounded, serving as additional secret keys. By mathematical analysis, STLs are proven to have complex-value modulations on low frequency components of input signals of TSFTs, which cannot be removed by phase truncations (PTs) in the legal decryption stage. The plain/cipher-text-independent and non-removability features of STLs make phase retrieval attacks unable to exempt eavesdroppers from brute-force trials of STLs. A STL is implemented by an electrical arbitrary waveform generator (AWG) driven electro-optic phase modulator (EOPM). By numerical simulations, the using of STLs is proven to increase the difficulty of phase retrieval attacks in terms of the time consuming required for convergence. Even if phase retrieval attacks converge, the plaintext signal cannot be recovered without the knowledge of ϵ 1 , 2 in the encryption stage. The total key space of ϵ 1 , 2 is also evaluated as 2 17 at AWG bandwidth B m = 20 GHz, and as 2 37 at B m = 100 GHz. The fidelity robustness of our optical cryptosystem against possible noise and occlusion penalties on the communication channels and networks of optical cipher-text signals is also proven. A temporal phase-truncated double random phase encoding cryptosystem is proposed to be improved by replacing the temporal Fourier transformers (TFTs) of the dispersion-time lens-dispersion structure with temporal skew Fourier transformers (TSFTs). A TSFT is similar to a TFT except for the time lens (TL) replaced by a skew time lens (STL). A STL is a temporal analog of a spatial cylindrical lens with the in-plane rotational asymmetry mapping to a front–back asymmetry. The front–back asymmetry is achieved by adding the chirp factor C of a TL by + ϵ ⋅ C and − ϵ ⋅ C respectively along the positive and negative half axis of the local time coordinate. The skew coefficients ϵ 1 and ϵ 2 of the two TSFTs involved in the encryption stage are dimensionless and ideally unbounded, serving as additional secret keys. By mathematical analysis, STLs are proven to have complex-value modulations on low frequency components of input signals of TSFTs, which cannot be removed by phase truncations (PTs) in the legal decryption stage. The plain/cipher-text-independent and non-removability features of STLs make phase retrieval attacks unable to exempt eavesdroppers from brute-force trials of STLs. A STL is implemented by an electrical arbitrary waveform generator (AWG) driven electro-optic phase modulator (EOPM). By numerical simulations, the using of STLs is proven to increase the difficulty of phase retrieval attacks in terms of the time consuming required for convergence. Even if phase retrieval attacks converge, the plaintext signal cannot be recovered without the knowledge of ϵ 1 , 2 in the encryption stage. The total key space of ϵ 1 , 2 is also evaluated as 2 17 at AWG bandwidth B m = 20 GHz, and as 2 37 at B m = 100 GHz. The fidelity robustness of our optical cryptosystem against possible noise and occlusion penalties on the communication channels and networks of optical cipher-text signals is also proven. Phase truncation Elsevier Optical communications Elsevier Cylindrical lens Elsevier Double random phase encoding Elsevier Phase retrieval attacks Elsevier Optical encryption Elsevier Lou, Shuqin oth Enthalten in Niu, Zhenzhen ELSEVIER Effect of hawthorn seed extract on the gastrointestinal function of rats with diabetic gastroparesis 2020 Amsterdam (DE-627)ELV004103645 volume:483 year:2021 day:15 month:03 pages:0 https://doi.org/10.1016/j.optcom.2020.126635 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U FID-AFRIKA FID-BIODIV 42.38 Botanik: Allgemeines VZ AR 483 2021 15 0315 0 |
| spelling |
10.1016/j.optcom.2020.126635 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001245.pica (DE-627)ELV052560929 (ELSEVIER)S0030-4018(20)31053-1 DE-627 ger DE-627 rakwb eng 580 VZ AFRIKA DE-30 fid BIODIV DE-30 fid 42.38 bkl Wang, Mingqing verfasserin aut A temporal phase-truncated double random phase encoding cryptosystem in the temporal skew Fourier transform domain 2021transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier A temporal phase-truncated double random phase encoding cryptosystem is proposed to be improved by replacing the temporal Fourier transformers (TFTs) of the dispersion-time lens-dispersion structure with temporal skew Fourier transformers (TSFTs). A TSFT is similar to a TFT except for the time lens (TL) replaced by a skew time lens (STL). A STL is a temporal analog of a spatial cylindrical lens with the in-plane rotational asymmetry mapping to a front–back asymmetry. The front–back asymmetry is achieved by adding the chirp factor C of a TL by + ϵ ⋅ C and − ϵ ⋅ C respectively along the positive and negative half axis of the local time coordinate. The skew coefficients ϵ 1 and ϵ 2 of the two TSFTs involved in the encryption stage are dimensionless and ideally unbounded, serving as additional secret keys. By mathematical analysis, STLs are proven to have complex-value modulations on low frequency components of input signals of TSFTs, which cannot be removed by phase truncations (PTs) in the legal decryption stage. The plain/cipher-text-independent and non-removability features of STLs make phase retrieval attacks unable to exempt eavesdroppers from brute-force trials of STLs. A STL is implemented by an electrical arbitrary waveform generator (AWG) driven electro-optic phase modulator (EOPM). By numerical simulations, the using of STLs is proven to increase the difficulty of phase retrieval attacks in terms of the time consuming required for convergence. Even if phase retrieval attacks converge, the plaintext signal cannot be recovered without the knowledge of ϵ 1 , 2 in the encryption stage. The total key space of ϵ 1 , 2 is also evaluated as 2 17 at AWG bandwidth B m = 20 GHz, and as 2 37 at B m = 100 GHz. The fidelity robustness of our optical cryptosystem against possible noise and occlusion penalties on the communication channels and networks of optical cipher-text signals is also proven. A temporal phase-truncated double random phase encoding cryptosystem is proposed to be improved by replacing the temporal Fourier transformers (TFTs) of the dispersion-time lens-dispersion structure with temporal skew Fourier transformers (TSFTs). A TSFT is similar to a TFT except for the time lens (TL) replaced by a skew time lens (STL). A STL is a temporal analog of a spatial cylindrical lens with the in-plane rotational asymmetry mapping to a front–back asymmetry. The front–back asymmetry is achieved by adding the chirp factor C of a TL by + ϵ ⋅ C and − ϵ ⋅ C respectively along the positive and negative half axis of the local time coordinate. The skew coefficients ϵ 1 and ϵ 2 of the two TSFTs involved in the encryption stage are dimensionless and ideally unbounded, serving as additional secret keys. By mathematical analysis, STLs are proven to have complex-value modulations on low frequency components of input signals of TSFTs, which cannot be removed by phase truncations (PTs) in the legal decryption stage. The plain/cipher-text-independent and non-removability features of STLs make phase retrieval attacks unable to exempt eavesdroppers from brute-force trials of STLs. A STL is implemented by an electrical arbitrary waveform generator (AWG) driven electro-optic phase modulator (EOPM). By numerical simulations, the using of STLs is proven to increase the difficulty of phase retrieval attacks in terms of the time consuming required for convergence. Even if phase retrieval attacks converge, the plaintext signal cannot be recovered without the knowledge of ϵ 1 , 2 in the encryption stage. The total key space of ϵ 1 , 2 is also evaluated as 2 17 at AWG bandwidth B m = 20 GHz, and as 2 37 at B m = 100 GHz. The fidelity robustness of our optical cryptosystem against possible noise and occlusion penalties on the communication channels and networks of optical cipher-text signals is also proven. Phase truncation Elsevier Optical communications Elsevier Cylindrical lens Elsevier Double random phase encoding Elsevier Phase retrieval attacks Elsevier Optical encryption Elsevier Lou, Shuqin oth Enthalten in Niu, Zhenzhen ELSEVIER Effect of hawthorn seed extract on the gastrointestinal function of rats with diabetic gastroparesis 2020 Amsterdam (DE-627)ELV004103645 volume:483 year:2021 day:15 month:03 pages:0 https://doi.org/10.1016/j.optcom.2020.126635 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U FID-AFRIKA FID-BIODIV 42.38 Botanik: Allgemeines VZ AR 483 2021 15 0315 0 |
| allfields_unstemmed |
10.1016/j.optcom.2020.126635 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001245.pica (DE-627)ELV052560929 (ELSEVIER)S0030-4018(20)31053-1 DE-627 ger DE-627 rakwb eng 580 VZ AFRIKA DE-30 fid BIODIV DE-30 fid 42.38 bkl Wang, Mingqing verfasserin aut A temporal phase-truncated double random phase encoding cryptosystem in the temporal skew Fourier transform domain 2021transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier A temporal phase-truncated double random phase encoding cryptosystem is proposed to be improved by replacing the temporal Fourier transformers (TFTs) of the dispersion-time lens-dispersion structure with temporal skew Fourier transformers (TSFTs). A TSFT is similar to a TFT except for the time lens (TL) replaced by a skew time lens (STL). A STL is a temporal analog of a spatial cylindrical lens with the in-plane rotational asymmetry mapping to a front–back asymmetry. The front–back asymmetry is achieved by adding the chirp factor C of a TL by + ϵ ⋅ C and − ϵ ⋅ C respectively along the positive and negative half axis of the local time coordinate. The skew coefficients ϵ 1 and ϵ 2 of the two TSFTs involved in the encryption stage are dimensionless and ideally unbounded, serving as additional secret keys. By mathematical analysis, STLs are proven to have complex-value modulations on low frequency components of input signals of TSFTs, which cannot be removed by phase truncations (PTs) in the legal decryption stage. The plain/cipher-text-independent and non-removability features of STLs make phase retrieval attacks unable to exempt eavesdroppers from brute-force trials of STLs. A STL is implemented by an electrical arbitrary waveform generator (AWG) driven electro-optic phase modulator (EOPM). By numerical simulations, the using of STLs is proven to increase the difficulty of phase retrieval attacks in terms of the time consuming required for convergence. Even if phase retrieval attacks converge, the plaintext signal cannot be recovered without the knowledge of ϵ 1 , 2 in the encryption stage. The total key space of ϵ 1 , 2 is also evaluated as 2 17 at AWG bandwidth B m = 20 GHz, and as 2 37 at B m = 100 GHz. The fidelity robustness of our optical cryptosystem against possible noise and occlusion penalties on the communication channels and networks of optical cipher-text signals is also proven. A temporal phase-truncated double random phase encoding cryptosystem is proposed to be improved by replacing the temporal Fourier transformers (TFTs) of the dispersion-time lens-dispersion structure with temporal skew Fourier transformers (TSFTs). A TSFT is similar to a TFT except for the time lens (TL) replaced by a skew time lens (STL). A STL is a temporal analog of a spatial cylindrical lens with the in-plane rotational asymmetry mapping to a front–back asymmetry. The front–back asymmetry is achieved by adding the chirp factor C of a TL by + ϵ ⋅ C and − ϵ ⋅ C respectively along the positive and negative half axis of the local time coordinate. The skew coefficients ϵ 1 and ϵ 2 of the two TSFTs involved in the encryption stage are dimensionless and ideally unbounded, serving as additional secret keys. By mathematical analysis, STLs are proven to have complex-value modulations on low frequency components of input signals of TSFTs, which cannot be removed by phase truncations (PTs) in the legal decryption stage. The plain/cipher-text-independent and non-removability features of STLs make phase retrieval attacks unable to exempt eavesdroppers from brute-force trials of STLs. A STL is implemented by an electrical arbitrary waveform generator (AWG) driven electro-optic phase modulator (EOPM). By numerical simulations, the using of STLs is proven to increase the difficulty of phase retrieval attacks in terms of the time consuming required for convergence. Even if phase retrieval attacks converge, the plaintext signal cannot be recovered without the knowledge of ϵ 1 , 2 in the encryption stage. The total key space of ϵ 1 , 2 is also evaluated as 2 17 at AWG bandwidth B m = 20 GHz, and as 2 37 at B m = 100 GHz. The fidelity robustness of our optical cryptosystem against possible noise and occlusion penalties on the communication channels and networks of optical cipher-text signals is also proven. Phase truncation Elsevier Optical communications Elsevier Cylindrical lens Elsevier Double random phase encoding Elsevier Phase retrieval attacks Elsevier Optical encryption Elsevier Lou, Shuqin oth Enthalten in Niu, Zhenzhen ELSEVIER Effect of hawthorn seed extract on the gastrointestinal function of rats with diabetic gastroparesis 2020 Amsterdam (DE-627)ELV004103645 volume:483 year:2021 day:15 month:03 pages:0 https://doi.org/10.1016/j.optcom.2020.126635 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U FID-AFRIKA FID-BIODIV 42.38 Botanik: Allgemeines VZ AR 483 2021 15 0315 0 |
| allfieldsGer |
10.1016/j.optcom.2020.126635 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001245.pica (DE-627)ELV052560929 (ELSEVIER)S0030-4018(20)31053-1 DE-627 ger DE-627 rakwb eng 580 VZ AFRIKA DE-30 fid BIODIV DE-30 fid 42.38 bkl Wang, Mingqing verfasserin aut A temporal phase-truncated double random phase encoding cryptosystem in the temporal skew Fourier transform domain 2021transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier A temporal phase-truncated double random phase encoding cryptosystem is proposed to be improved by replacing the temporal Fourier transformers (TFTs) of the dispersion-time lens-dispersion structure with temporal skew Fourier transformers (TSFTs). A TSFT is similar to a TFT except for the time lens (TL) replaced by a skew time lens (STL). A STL is a temporal analog of a spatial cylindrical lens with the in-plane rotational asymmetry mapping to a front–back asymmetry. The front–back asymmetry is achieved by adding the chirp factor C of a TL by + ϵ ⋅ C and − ϵ ⋅ C respectively along the positive and negative half axis of the local time coordinate. The skew coefficients ϵ 1 and ϵ 2 of the two TSFTs involved in the encryption stage are dimensionless and ideally unbounded, serving as additional secret keys. By mathematical analysis, STLs are proven to have complex-value modulations on low frequency components of input signals of TSFTs, which cannot be removed by phase truncations (PTs) in the legal decryption stage. The plain/cipher-text-independent and non-removability features of STLs make phase retrieval attacks unable to exempt eavesdroppers from brute-force trials of STLs. A STL is implemented by an electrical arbitrary waveform generator (AWG) driven electro-optic phase modulator (EOPM). By numerical simulations, the using of STLs is proven to increase the difficulty of phase retrieval attacks in terms of the time consuming required for convergence. Even if phase retrieval attacks converge, the plaintext signal cannot be recovered without the knowledge of ϵ 1 , 2 in the encryption stage. The total key space of ϵ 1 , 2 is also evaluated as 2 17 at AWG bandwidth B m = 20 GHz, and as 2 37 at B m = 100 GHz. The fidelity robustness of our optical cryptosystem against possible noise and occlusion penalties on the communication channels and networks of optical cipher-text signals is also proven. A temporal phase-truncated double random phase encoding cryptosystem is proposed to be improved by replacing the temporal Fourier transformers (TFTs) of the dispersion-time lens-dispersion structure with temporal skew Fourier transformers (TSFTs). A TSFT is similar to a TFT except for the time lens (TL) replaced by a skew time lens (STL). A STL is a temporal analog of a spatial cylindrical lens with the in-plane rotational asymmetry mapping to a front–back asymmetry. The front–back asymmetry is achieved by adding the chirp factor C of a TL by + ϵ ⋅ C and − ϵ ⋅ C respectively along the positive and negative half axis of the local time coordinate. The skew coefficients ϵ 1 and ϵ 2 of the two TSFTs involved in the encryption stage are dimensionless and ideally unbounded, serving as additional secret keys. By mathematical analysis, STLs are proven to have complex-value modulations on low frequency components of input signals of TSFTs, which cannot be removed by phase truncations (PTs) in the legal decryption stage. The plain/cipher-text-independent and non-removability features of STLs make phase retrieval attacks unable to exempt eavesdroppers from brute-force trials of STLs. A STL is implemented by an electrical arbitrary waveform generator (AWG) driven electro-optic phase modulator (EOPM). By numerical simulations, the using of STLs is proven to increase the difficulty of phase retrieval attacks in terms of the time consuming required for convergence. Even if phase retrieval attacks converge, the plaintext signal cannot be recovered without the knowledge of ϵ 1 , 2 in the encryption stage. The total key space of ϵ 1 , 2 is also evaluated as 2 17 at AWG bandwidth B m = 20 GHz, and as 2 37 at B m = 100 GHz. The fidelity robustness of our optical cryptosystem against possible noise and occlusion penalties on the communication channels and networks of optical cipher-text signals is also proven. Phase truncation Elsevier Optical communications Elsevier Cylindrical lens Elsevier Double random phase encoding Elsevier Phase retrieval attacks Elsevier Optical encryption Elsevier Lou, Shuqin oth Enthalten in Niu, Zhenzhen ELSEVIER Effect of hawthorn seed extract on the gastrointestinal function of rats with diabetic gastroparesis 2020 Amsterdam (DE-627)ELV004103645 volume:483 year:2021 day:15 month:03 pages:0 https://doi.org/10.1016/j.optcom.2020.126635 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U FID-AFRIKA FID-BIODIV 42.38 Botanik: Allgemeines VZ AR 483 2021 15 0315 0 |
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10.1016/j.optcom.2020.126635 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001245.pica (DE-627)ELV052560929 (ELSEVIER)S0030-4018(20)31053-1 DE-627 ger DE-627 rakwb eng 580 VZ AFRIKA DE-30 fid BIODIV DE-30 fid 42.38 bkl Wang, Mingqing verfasserin aut A temporal phase-truncated double random phase encoding cryptosystem in the temporal skew Fourier transform domain 2021transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier A temporal phase-truncated double random phase encoding cryptosystem is proposed to be improved by replacing the temporal Fourier transformers (TFTs) of the dispersion-time lens-dispersion structure with temporal skew Fourier transformers (TSFTs). A TSFT is similar to a TFT except for the time lens (TL) replaced by a skew time lens (STL). A STL is a temporal analog of a spatial cylindrical lens with the in-plane rotational asymmetry mapping to a front–back asymmetry. The front–back asymmetry is achieved by adding the chirp factor C of a TL by + ϵ ⋅ C and − ϵ ⋅ C respectively along the positive and negative half axis of the local time coordinate. The skew coefficients ϵ 1 and ϵ 2 of the two TSFTs involved in the encryption stage are dimensionless and ideally unbounded, serving as additional secret keys. By mathematical analysis, STLs are proven to have complex-value modulations on low frequency components of input signals of TSFTs, which cannot be removed by phase truncations (PTs) in the legal decryption stage. The plain/cipher-text-independent and non-removability features of STLs make phase retrieval attacks unable to exempt eavesdroppers from brute-force trials of STLs. A STL is implemented by an electrical arbitrary waveform generator (AWG) driven electro-optic phase modulator (EOPM). By numerical simulations, the using of STLs is proven to increase the difficulty of phase retrieval attacks in terms of the time consuming required for convergence. Even if phase retrieval attacks converge, the plaintext signal cannot be recovered without the knowledge of ϵ 1 , 2 in the encryption stage. The total key space of ϵ 1 , 2 is also evaluated as 2 17 at AWG bandwidth B m = 20 GHz, and as 2 37 at B m = 100 GHz. The fidelity robustness of our optical cryptosystem against possible noise and occlusion penalties on the communication channels and networks of optical cipher-text signals is also proven. A temporal phase-truncated double random phase encoding cryptosystem is proposed to be improved by replacing the temporal Fourier transformers (TFTs) of the dispersion-time lens-dispersion structure with temporal skew Fourier transformers (TSFTs). A TSFT is similar to a TFT except for the time lens (TL) replaced by a skew time lens (STL). A STL is a temporal analog of a spatial cylindrical lens with the in-plane rotational asymmetry mapping to a front–back asymmetry. The front–back asymmetry is achieved by adding the chirp factor C of a TL by + ϵ ⋅ C and − ϵ ⋅ C respectively along the positive and negative half axis of the local time coordinate. The skew coefficients ϵ 1 and ϵ 2 of the two TSFTs involved in the encryption stage are dimensionless and ideally unbounded, serving as additional secret keys. By mathematical analysis, STLs are proven to have complex-value modulations on low frequency components of input signals of TSFTs, which cannot be removed by phase truncations (PTs) in the legal decryption stage. The plain/cipher-text-independent and non-removability features of STLs make phase retrieval attacks unable to exempt eavesdroppers from brute-force trials of STLs. A STL is implemented by an electrical arbitrary waveform generator (AWG) driven electro-optic phase modulator (EOPM). By numerical simulations, the using of STLs is proven to increase the difficulty of phase retrieval attacks in terms of the time consuming required for convergence. Even if phase retrieval attacks converge, the plaintext signal cannot be recovered without the knowledge of ϵ 1 , 2 in the encryption stage. The total key space of ϵ 1 , 2 is also evaluated as 2 17 at AWG bandwidth B m = 20 GHz, and as 2 37 at B m = 100 GHz. The fidelity robustness of our optical cryptosystem against possible noise and occlusion penalties on the communication channels and networks of optical cipher-text signals is also proven. Phase truncation Elsevier Optical communications Elsevier Cylindrical lens Elsevier Double random phase encoding Elsevier Phase retrieval attacks Elsevier Optical encryption Elsevier Lou, Shuqin oth Enthalten in Niu, Zhenzhen ELSEVIER Effect of hawthorn seed extract on the gastrointestinal function of rats with diabetic gastroparesis 2020 Amsterdam (DE-627)ELV004103645 volume:483 year:2021 day:15 month:03 pages:0 https://doi.org/10.1016/j.optcom.2020.126635 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U FID-AFRIKA FID-BIODIV 42.38 Botanik: Allgemeines VZ AR 483 2021 15 0315 0 |
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a temporal phase-truncated double random phase encoding cryptosystem in the temporal skew fourier transform domain |
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A temporal phase-truncated double random phase encoding cryptosystem in the temporal skew Fourier transform domain |
| abstract |
A temporal phase-truncated double random phase encoding cryptosystem is proposed to be improved by replacing the temporal Fourier transformers (TFTs) of the dispersion-time lens-dispersion structure with temporal skew Fourier transformers (TSFTs). A TSFT is similar to a TFT except for the time lens (TL) replaced by a skew time lens (STL). A STL is a temporal analog of a spatial cylindrical lens with the in-plane rotational asymmetry mapping to a front–back asymmetry. The front–back asymmetry is achieved by adding the chirp factor C of a TL by + ϵ ⋅ C and − ϵ ⋅ C respectively along the positive and negative half axis of the local time coordinate. The skew coefficients ϵ 1 and ϵ 2 of the two TSFTs involved in the encryption stage are dimensionless and ideally unbounded, serving as additional secret keys. By mathematical analysis, STLs are proven to have complex-value modulations on low frequency components of input signals of TSFTs, which cannot be removed by phase truncations (PTs) in the legal decryption stage. The plain/cipher-text-independent and non-removability features of STLs make phase retrieval attacks unable to exempt eavesdroppers from brute-force trials of STLs. A STL is implemented by an electrical arbitrary waveform generator (AWG) driven electro-optic phase modulator (EOPM). By numerical simulations, the using of STLs is proven to increase the difficulty of phase retrieval attacks in terms of the time consuming required for convergence. Even if phase retrieval attacks converge, the plaintext signal cannot be recovered without the knowledge of ϵ 1 , 2 in the encryption stage. The total key space of ϵ 1 , 2 is also evaluated as 2 17 at AWG bandwidth B m = 20 GHz, and as 2 37 at B m = 100 GHz. The fidelity robustness of our optical cryptosystem against possible noise and occlusion penalties on the communication channels and networks of optical cipher-text signals is also proven. |
| abstractGer |
A temporal phase-truncated double random phase encoding cryptosystem is proposed to be improved by replacing the temporal Fourier transformers (TFTs) of the dispersion-time lens-dispersion structure with temporal skew Fourier transformers (TSFTs). A TSFT is similar to a TFT except for the time lens (TL) replaced by a skew time lens (STL). A STL is a temporal analog of a spatial cylindrical lens with the in-plane rotational asymmetry mapping to a front–back asymmetry. The front–back asymmetry is achieved by adding the chirp factor C of a TL by + ϵ ⋅ C and − ϵ ⋅ C respectively along the positive and negative half axis of the local time coordinate. The skew coefficients ϵ 1 and ϵ 2 of the two TSFTs involved in the encryption stage are dimensionless and ideally unbounded, serving as additional secret keys. By mathematical analysis, STLs are proven to have complex-value modulations on low frequency components of input signals of TSFTs, which cannot be removed by phase truncations (PTs) in the legal decryption stage. The plain/cipher-text-independent and non-removability features of STLs make phase retrieval attacks unable to exempt eavesdroppers from brute-force trials of STLs. A STL is implemented by an electrical arbitrary waveform generator (AWG) driven electro-optic phase modulator (EOPM). By numerical simulations, the using of STLs is proven to increase the difficulty of phase retrieval attacks in terms of the time consuming required for convergence. Even if phase retrieval attacks converge, the plaintext signal cannot be recovered without the knowledge of ϵ 1 , 2 in the encryption stage. The total key space of ϵ 1 , 2 is also evaluated as 2 17 at AWG bandwidth B m = 20 GHz, and as 2 37 at B m = 100 GHz. The fidelity robustness of our optical cryptosystem against possible noise and occlusion penalties on the communication channels and networks of optical cipher-text signals is also proven. |
| abstract_unstemmed |
A temporal phase-truncated double random phase encoding cryptosystem is proposed to be improved by replacing the temporal Fourier transformers (TFTs) of the dispersion-time lens-dispersion structure with temporal skew Fourier transformers (TSFTs). A TSFT is similar to a TFT except for the time lens (TL) replaced by a skew time lens (STL). A STL is a temporal analog of a spatial cylindrical lens with the in-plane rotational asymmetry mapping to a front–back asymmetry. The front–back asymmetry is achieved by adding the chirp factor C of a TL by + ϵ ⋅ C and − ϵ ⋅ C respectively along the positive and negative half axis of the local time coordinate. The skew coefficients ϵ 1 and ϵ 2 of the two TSFTs involved in the encryption stage are dimensionless and ideally unbounded, serving as additional secret keys. By mathematical analysis, STLs are proven to have complex-value modulations on low frequency components of input signals of TSFTs, which cannot be removed by phase truncations (PTs) in the legal decryption stage. The plain/cipher-text-independent and non-removability features of STLs make phase retrieval attacks unable to exempt eavesdroppers from brute-force trials of STLs. A STL is implemented by an electrical arbitrary waveform generator (AWG) driven electro-optic phase modulator (EOPM). By numerical simulations, the using of STLs is proven to increase the difficulty of phase retrieval attacks in terms of the time consuming required for convergence. Even if phase retrieval attacks converge, the plaintext signal cannot be recovered without the knowledge of ϵ 1 , 2 in the encryption stage. The total key space of ϵ 1 , 2 is also evaluated as 2 17 at AWG bandwidth B m = 20 GHz, and as 2 37 at B m = 100 GHz. The fidelity robustness of our optical cryptosystem against possible noise and occlusion penalties on the communication channels and networks of optical cipher-text signals is also proven. |
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10.1016/j.optcom.2020.126635 |
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2024-07-06T23:21:51.768Z |
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