On the Security of the RC5 Encryption Algorithm

Intro
The RC5 encryption algorithm was designed by Professor Ronald Rivest of MIT and rst published in December 1994 . Since its publication, RC5 has attracted the attention of many researchers in the cryptographic community in e orts to accurately assess the security o ered. In this report, we will focus our discussions on the security of RC5 against di erential and linear crypt-analysis, but we will also give a brief summary of other known cryptanalytic results on RC5.
The analysis of a cartographic algorithm is of course essential to its acceptance and use. We observe that the lengthy analysis of the Data Encryption Standard  prior to publication, though not public, resulted in an algorithm that has resisted attack for many years. Our hope is that this report will provide a foundation for similarly robust analysis of RC5 by the cryptography community. In this way any weaknesses can be found early, and so that if RC5 or its enhancements (e.g., RC6 [18]) survive the process it will be suitable as one of the potential successors to DES. We welcome critical comments on this report, and additional approaches to analyzing RC5.

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