The Vernam cipher is robust to small deviations from randomness

The Vernam cipher, or one-time pad, plays an important role in cryptography because it is perfectly secure. In this cipher a key is a sequence of equiprobable independently generated symbols. We show that under small disturbance of these properties the obtained cipher is close to the Vernam cipher i...

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Bibliographic Details
Published in:Problems of information transmission 2015, Vol.51 (1), p.82-86
Main Author: Ryabko, B. Ya
Format: Article
Language:English
Subjects:
Communications Engineering
Control
Electrical Engineering
Engineering
Information Storage and Retrieval
Networks
Source Coding
Systems Theory
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Summary:The Vernam cipher, or one-time pad, plays an important role in cryptography because it is perfectly secure. In this cipher a key is a sequence of equiprobable independently generated symbols. We show that under small disturbance of these properties the obtained cipher is close to the Vernam cipher in the case where the enciphered plaintext and the key are generated by stationary ergodic sources.
ISSN:0032-9460
1608-3253
DOI:10.1134/S0032946015010093