Weaknesses in Hadamard Based Symmetric Key Encryption Schemes

Gajraj Kuldeep; Devendra Kumar Yadav; A.  K.  Sharma

Paper 2016/075 Original: eprint.iacr.org/2016/075 ↗

Weaknesses in Hadamard Based Symmetric Key Encryption Schemes

Gajraj Kuldeep

Devendra Kumar Yadav

A. K. Sharma

Abstract

In this paper security aspects of the existing symmetric key encryption schemes based on Hadamard matrices are examined. Hadamard matrices itself have symmetries like one circulant core or two circulant core. Here, we are exploiting the inherent symmetries of Hadamard matrices and are able to perform attacks on these encryption schemes. It is found that entire key can be obtained by observing the ciphertext.

Metadata

Available format(s): PDF
Category: Secret-key cryptography
Publication info: Preprint.
History: 2016-01-28: last updated; 2016-01-28: published
Short URL: https://ia.cr/2016/075
License: https://creativecommons.org/licenses/by/4.0/

BibTeX

@misc{cryptoeprint:2016/075,
      author = {Gajraj Kuldeep and Devendra Kumar Yadav and A.  K.  Sharma},
      title = {Weaknesses in Hadamard Based Symmetric Key Encryption Schemes},
      howpublished = {Cryptology {ePrint} Archive, Paper 2016/075},
      year = {2016},
      url = {https://eprint.iacr.org/2016/075}
}