Getting around the Shannon limit of cryptography

Hirota, Osamu

doi:10.1117/2.1201008.003069

Cited by 3 publications

(1 citation statement)

References 6 publications

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“…When p = 2 -64 , even N = 10 7 periods are not enough for Eve, only allowing her to guess the correct (k, Δk) with a probability of about 10 -13 . Therefore it was shown that Y00 protocol can go beyond the Shannon Limit of cryptography 30 . While Eve's success probability is small enough, Alice has to send fresh keys to Bob to continue secure quantum communications.…”

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confidence: 99%

Guessing probability under unlimited known-plaintext attack on secret keys for Y00 quantum stream cipher by quantum multiple hypotheses testing

Iwakoshi

2018

Opt. Eng.

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Although quantum key distribution is regarded as promising secure communication, security of Y00 protocol proposed by Yuen in 2000 for the affinity to conventional optical communication is not well-understood yet; its security has been evaluated only by the eavesdropper's error probabilities of detecting individual signals or masking size, the number of hidden signal levels under quantum and classical noise. Our study is the first challenge of evaluating the guessing probabilities on shared secret keys for pseudorandom number generators in a simplified Y00 communication system based on quantum multiple hypotheses testing theory. The result is that even unlimitedly long known-plaintext attack only lets the eavesdropper guess the shared secret keys of limited lengths with a probability strictly <1. This study will give some insights for detailed future works on this quantum communication protocol.

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Guessing probability under unlimited known-plaintext attack on secret keys for Y00 quantum stream cipher by quantum multiple hypotheses testing

Iwakoshi

2018

Opt. Eng.

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Survey on quantum noise stream cipher implemented optical communication systems

Mariamichael¹,

Raj²,

Selvaraj³

2023

Journal of Optical Communications

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This survey presents on the implementations of Quantum Noise Stream Cipher or Quantum Steam Cipher with various modulation formats – like QAM, PSK. FSK, etc., in optical fiber communication systems – along with other pertinent implementation details. Quantum Stream Cipher can be provably secure in information theoretical terms, and it achieves improved security due its inherent (noisy) randomness. This paper presents also a brief review on its claimed improved security, along with the open issues.

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New Quantum Cipher Optical Communication: Y-00

Harasawa¹

2012

Optical Communication

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Getting around the Shannon limit of cryptography

Cited by 3 publications

References 6 publications

Guessing probability under unlimited known-plaintext attack on secret keys for Y00 quantum stream cipher by quantum multiple hypotheses testing

Guessing probability under unlimited known-plaintext attack on secret keys for Y00 quantum stream cipher by quantum multiple hypotheses testing

Survey on quantum noise stream cipher implemented optical communication systems

New Quantum Cipher Optical Communication: Y-00

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