Cryptology ePrint Archive: Report 2019/041

Message Authentication (MAC) Algorithm For The VMPC-R (RC4-like) Stream Cipher

Bartosz Zoltak

Abstract: We propose an authenticated encryption scheme for the VMPC-R stream cipher. VMPC-R is an RC4-like algorithm proposed in 2013. It was created in a challenge to find a bias-free cipher within the RC4 design scope and to the best of our knowledge no security weakness in it has been published to date. The contribution of this paper is an algorithm to compute Message Authentication Codes (MACs) along with VMPC-R encryption. We also propose a simple method of transforming the MAC computation algorithm into a hash function.

Category / Keywords: secret-key cryptography / stream cipher; RC4; VMPC-R; distinguishing attack; bias; Message Authentication Code (MAC); hash function

Date: received 16 Jan 2019, last revised 18 Jan 2019

Contact author: bzoltak at vmpcfunction com

Available format(s): PDF | BibTeX Citation

Version: 20190118:153723 (All versions of this report)

Short URL: ia.cr/2019/041


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