Cryptology ePrint Archive: Report 2014/421

FNR : Arbitrary length small domain block cipher proposal

Sashank Dara, Scott Fluhrer

Abstract: We propose a practical flexible (or arbitrary) length small domain block cipher, FNR encryption scheme. FNR denotes Flexible Naor and Reingold. It can cipher small domain data formats like IPv4, Port numbers, MAC Addresses, Credit card numbers, any random short strings while preserving their input length. In addition to the classic Feistel networks, Naor and Reingold propose usage of Pair-wise independent permutation (PwIP) functions based on Galois Field GF(2n). Instead we propose usage of random NXN Invertible matrices in GF(2).

Category / Keywords: secret-key cryptography / block ciphers

Original Publication (with minor differences): Fourth International Conference on Security, Privacy, and Applied Cryptography Engineering (SPACE 2014) Defence Institute of Advanced Technology, Pune, India, 18th - 22nd October 2014

Date: received 3 Jun 2014, last revised 25 Jul 2014

Contact author: sadara at cisco com

Available format(s): PDF | BibTeX Citation

Note: Camera Print version of the paper sent to conference

Version: 20140726:033726 (All versions of this report)

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