dorsal/arxiv
View SchemaQuantum Noise Randomized Ciphers
| Authors | Ranjith Nair, Horace P. Yuen, Eric Corndorf, Takami Eguchi, Prem Kumar |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0603263 |
| URL | https://arxiv.org/abs/quant-ph/0603263 |
| DOI | 10.1103/PhysRevA.74.052309 |
Abstract
We review the notion of a classical random cipher and its advantages. We sharpen the usual description of random ciphers to a particular mathematical characterization suggested by the salient feature responsible for their increased security. We describe a concrete system known as AlphaEta and show that it is equivalent to a random cipher in which the required randomization is effected by coherent-state quantum noise. We describe the currently known security features of AlphaEta and similar systems, including lower bounds on the unicity distances against ciphertext-only and known-plaintext attacks. We show how AlphaEta used in conjunction with any standard stream cipher such as AES (Advanced Encryption Standard) provides an additional, qualitatively different layer of security from physical encryption against known-plaintext attacks on the key. We refute some claims in the literature that AlphaEta is equivalent to a non-random stream cipher.
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"abstract": "We review the notion of a classical random cipher and its advantages. We\nsharpen the usual description of random ciphers to a particular mathematical\ncharacterization suggested by the salient feature responsible for their\nincreased security. We describe a concrete system known as AlphaEta and show\nthat it is equivalent to a random cipher in which the required randomization is\neffected by coherent-state quantum noise. We describe the currently known\nsecurity features of AlphaEta and similar systems, including lower bounds on\nthe unicity distances against ciphertext-only and known-plaintext attacks. We\nshow how AlphaEta used in conjunction with any standard stream cipher such as\nAES (Advanced Encryption Standard) provides an additional, qualitatively\ndifferent layer of security from physical encryption against known-plaintext\nattacks on the key. We refute some claims in the literature that AlphaEta is\nequivalent to a non-random stream cipher.",
"arxiv_id": "quant-ph/0603263",
"authors": [
"Ranjith Nair",
"Horace P. Yuen",
"Eric Corndorf",
"Takami Eguchi",
"Prem Kumar"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevA.74.052309",
"title": "Quantum Noise Randomized Ciphers",
"url": "https://arxiv.org/abs/quant-ph/0603263"
},
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