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RC5
Block cipher / From Wikipedia, the free encyclopedia
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This article is about the block cipher. For the infrared remote control protocol, see RC-5.
In cryptography, RC5 is a symmetric-key block cipher notable for its simplicity. Designed by Ronald Rivest in 1994,[2] RC stands for "Rivest Cipher", or alternatively, "Ron's Code" (compare RC2 and RC4). The Advanced Encryption Standard (AES) candidate RC6 was based on RC5.
Quick Facts General, Designers ...
![]() One round (two half-rounds) of the RC5 block cipher | |
General | |
---|---|
Designers | Ron Rivest |
First published | 1994 |
Successors | RC6, Akelarre |
Cipher detail | |
Key sizes | 0 to 2040 bits (128 suggested) |
Block sizes | 32, 64 or 128 bits (64 suggested) |
Structure | Feistel-like network |
Rounds | 1-255 (12 suggested originally) |
Best public cryptanalysis | |
12-round RC5 (with 64-bit blocks) is susceptible to a differential attack using 244 chosen plaintexts.[1] |
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