Physics – Quantum Physics
Scientific paper
2006-03-29
Physics
Quantum Physics
Accepted for publication in Phys. Rev. A; Discussion augmented and re-organized; Section 5 contains a detailed response to 'T.
Scientific paper
10.1103/PhysRevA.74.052309
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.
Corndorf Eric
Eguchi Takami
Kumar Prem
Nair Ranjith
Yuen Horace P.
No associations
LandOfFree
Quantum Noise Randomized Ciphers does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Quantum Noise Randomized Ciphers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Quantum Noise Randomized Ciphers will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-586452