RC4 is a fast and simple stream cipher used correctly in SSL and incorrectly in WEP.

learn more… | top users | synonyms

5
votes
2answers
113 views

How does one measure the decrease in security, if any, of RC4 when mapping to a specific range of values?

For a project using RC4, the output is to be mapped to values of 0 to 35. Thus, only 36 unique output values representing the letters A to Z and 0 to 9. To avoid bias, the RC4 byte output (with a ...
31
votes
7answers
21k views

Google is using RC4, but isn't RC4 considered unsafe?

Why is Google using RC4 for their HTTPS/SSL? $ openssl s_client -connect www.google.com:443 | grep "Cipher is" New, TLSv1/SSLv3, Cipher is RC4-SHA Isn't RC4 ...
5
votes
2answers
210 views

How are constructs with data-dependent swaps and rotations cryptanalyzed?

Linear and differential cryptanalysis seem well suited for constructs with a (relatively) simple fixed structure of boolean expressions. But some ciphers incorporate swaps of array elements where the ...