Jump index in T-functions for designing a new basic structure of stream ciphers

Ali Hadipour; Seyed Mahdi Sajadieh; Raheleh Afifi

Paper 2020/158

Jump index in T-functions for designing a new basic structure of stream ciphers

Ali Hadipour, Seyed Mahdi Sajadieh, and Raheleh Afifi

Abstract

The stream ciphers are a set of symmetric algorithms that receive a secret message as a sequence of bits and perform an encryption operation using a complex function based on key and IV, and combine xor with bit sequences. One of the goals in designing stream ciphers is to obtain a minimum period, which is one of the primary functions of using T-functions. On the other hand, the use of jump index in the design of LFSRs has made the analysis of LFSR-based stream ciphers more complicated. In this paper, we have tried to introduce a new method for designing the initial functions of stream ciphers with the use of T-functions concepts and the use of jump indexes, that has the maximum period. This method is resist side-channel attacks and can be efficiently implemented in hardware for a wide range of target processes and platforms.

Note: New basic structure for designing primitives of stream ciphers

Metadata

Available format(s): PDF
Category: Foundations
Publication info: Preprint. MINOR revision.
Keywords: T-Function Jump Index Stream cipher Maximum Period
Contact author(s): a hadipour64 @ gmail com
History: 2020-02-13: received
Short URL: https://ia.cr/2020/158
License: CC BY

BibTeX

@misc{cryptoeprint:2020/158,
      author = {Ali Hadipour and Seyed Mahdi Sajadieh and Raheleh Afifi},
      title = {Jump index in T-functions for designing a new basic structure of stream ciphers},
      howpublished = {Cryptology {ePrint} Archive, Paper 2020/158},
      year = {2020},
      url = {https://eprint.iacr.org/2020/158}
}