### Communicating Through Subliminal-Free Signatures

George Teseleanu

##### Abstract

By exploiting the inherent randomness used by certain digital signature protocols, subliminal channels can subvert these protocols without degrading their security. Due to their nature, these channels cannot be easily detected by an outside observer. Therefore, they pose a severe challenge for protocol designers. More precisely, designers consider certain assumptions implicitly, but in reality these assumptions turn out to be false or cannot be enforced or verified. In this paper we exemplify exactly such a situation by presenting several subliminal channels with a small capacity in Zhang et al. and Dong et al.'s subliminal-free signature protocols.

Available format(s)
Category
Cryptographic protocols
Publication info
Published elsewhere. NordSec 2021
Keywords
subliminal channelscuckoo's channelsfail-stop channelscovert communication
Contact author(s)
george teseleanu @ yahoo com
History
Short URL
https://ia.cr/2021/1331

CC BY

BibTeX

@misc{cryptoeprint:2021/1331,
author = {George Teseleanu},
title = {Communicating Through Subliminal-Free Signatures},
howpublished = {Cryptology ePrint Archive, Paper 2021/1331},
year = {2021},
note = {\url{https://eprint.iacr.org/2021/1331}},
url = {https://eprint.iacr.org/2021/1331}
}

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