Stream Deniable-Encryption Algorithms
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MOLDOVYAN, Nikolay, MOLDOVYAN, Alexandr, MOLDOVYAN, Dmitriy, SHCHERBACOV, Victor. Stream Deniable-Encryption Algorithms. In: Computer Science Journal of Moldova, 2016, nr. 1(70), pp. 68-82. ISSN 1561-4042.
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Computer Science Journal of Moldova
Numărul 1(70) / 2016 / ISSN 1561-4042 /ISSNe 2587-4330

Stream Deniable-Encryption Algorithms
CZU: [512.64+519.72]:004.421.2

Pag. 68-82

Moldovyan Nikolay1, Moldovyan Alexandr2, Moldovyan Dmitriy1, Shcherbacov Victor3
 
1 Institute for Informatics and Automation of Russian Academy of Sciences Sankt Petersburg,
2 Saint-Petersburg State University of Information Technologies, Mechanics and Optics,
3 Institute of Mathematics and Computer Science ASM
 
Disponibil în IBN: 28 aprilie 2016


Rezumat

A method for stream deniable encryption of secret message is proposed, which is computationally indistinguishable from the probabilistic encryption of some fake message. The method uses generation of two key streams with some secure block cipher. One of the key streams is generated depending on the secret key and the other one is generated depending on the fake key. The key streams are mixed with the secret and fake data streams so that the output ciphertext looks like the ciphertext produced by some probabilistic encryption algorithm applied to the fake message, while using the fake key. When the receiver or/and sender of the ciphertext are coerced to open the encryption key and the source message, they open the fake key and the fake message. To disclose their lie the coercer should demonstrate possibility of the alternative decryption of the ciphertext, however this is a computationally hard problem.

Cuvinte-cheie
cryptology, deniable, encryption.,

algorithm, stream