Cryptology ePrint Archive: Report 2016/075

Weaknesses in Hadamard Based Symmetric Key Encryption Schemes

Gajraj Kuldeep and Devendra Kumar Yadav and 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.

Category / Keywords: secret-key cryptography /

Date: received 27 Jan 2016

Contact author: gajrajkuldeep at gmail com

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Version: 20160128:153705 (All versions of this report)

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