Provable security of CFB mode of operation with external re-keying

Vadim Tsypyschev; Iliya Morgasov

Paper 2022/291

Provable security of CFB mode of operation with external re-keying

Vadim Tsypyschev, Moscow Engineering Physics Institute

Iliya Morgasov

Abstract

In this article the security of the cipher feedback mode of operation with regular external serial re-keying aiming to construct lightweight pseudo-random sequences generator is investigated. For this purpose the new mode of operation called Multi-key CFB, MCFB is introduced, and the estimations of provable security of this new mode in the LOR-CPA model are obtained. Besides that, the counterexample to well-known result of Abdalla-Bellare about security of encryption scheme with external re-keying is obtained.

Metadata

Available format(s): PDF
Category: Secret-key cryptography
Publication info: Preprint.
Keywords: Multy-key CFB external serial re-keying provable security
Contact author(s): tsypyschev @ yandex ru
History: 2022-05-30: revised; 2022-03-07: received; See all versions
Short URL: https://ia.cr/2022/291
License: CC BY

BibTeX

@misc{cryptoeprint:2022/291,
      author = {Vadim Tsypyschev and Iliya Morgasov},
      title = {Provable security of CFB mode of operation with external re-keying},
      howpublished = {Cryptology ePrint Archive, Paper 2022/291},
      year = {2022},
      note = {\url{https://eprint.iacr.org/2022/291}},
      url = {https://eprint.iacr.org/2022/291}
}