Cryptology ePrint Archive: Report 2008/473

Exploring Cipherspace: Combining stream ciphers and block ciphers

Sandy Harris

Abstract: This paper looks at the possibility of combining a block cipher and a stream cipher to get a strong hybrid cipher. It includes two specific proposals for combining AES-128 and RC4-128 to get a cipher that takes a 256-bit key and is significantly faster than AES-256, and arguably more secure. One is immune to algebraic attacks.

Category / Keywords: secret-key cryptography / block ciphers, stream ciphers, AES, hybrid ciphers, RC4

Date: received 9 Nov 2008, last revised 17 Nov 2008

Contact author: sandyinchina at gmail com

Available format(s): PDF | BibTeX Citation

Note: minor corrections, typos, reference format, added missing reference

Version: 20081118:204506 (All versions of this report)

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