Paper 2017/440
Cryptographic Security Analysis of T-310
Nicolas T. Courtois, Klaus Schmeh, Jörg Drobick, Jacques Patarin, Maria-Bristena Oprisanu, Matteo Scarlata, and Om Bhallamudi
Abstract
T-310 is an important Cold War cipher. It was the principal encryption algorithm used to protect various state communication lines in Eastern Germany throughout the 1980s. The cipher seems to be quite robust, and until now, no cryptography researcher has proposed an attack on T-310. In this paper we provide a detailed analysis of T-310 in the context of modern cryptography research and other important or similar ciphers developed in the same period. We introduce new notations which show the peculiar internal structure of this cipher in a new light. We point out a number of significant strong and weak properties of this cipher. Finally we propose several new attacks on T-310.
Note: This paper should be considered as no longer complete and no longer up to date. Will be updated less frequently and only if we consider it is really necessary.
Metadata
- Available format(s)
-
PDF
- Category
- Secret-key cryptography
- Publication info
- Published elsewhere. Major revision. long extended version of several papers published elsewhere
- Keywords
- Cold Warblock ciphersT-310SKS V1unbalanced compressing Feistel ciphersDifferential CryptanalysisLinear Cryptanalysiscorrelation attacksslide attacksself-similarity attacksciphertext-only attacks
- Contact author(s)
- n courtois @ bettercrypto com
- History
- 2019-03-27: last of 7 revisions
- 2017-05-23: received
- See all versions
- Short URL
- https://ia.cr/2017/440
- License
-
CC BY
BibTeX
@misc{cryptoeprint:2017/440,
author = {Nicolas T. Courtois and Klaus Schmeh and Jörg Drobick and Jacques Patarin and Maria-Bristena Oprisanu and Matteo Scarlata and Om Bhallamudi},
title = {Cryptographic Security Analysis of T-310},
howpublished = {Cryptology {ePrint} Archive, Paper 2017/440},
year = {2017},
url = {https://eprint.iacr.org/2017/440}
}