Questions tagged [rc2]

RC2 is a symmetric-key block cipher designed by Ron Rivest in 1987.

Filter by
Sorted by
Tagged with
3
votes
1answer
8k views

Difference between RC2, RC4, RC5 and RC6

Can anyone point out the core differences between RC variations?
0
votes
0answers
142 views

transforming RC2 keys to have effective minimum length in implementations with fixed effective lengths

mcrypt's implementation of RC2 has a fixed effective length of 1024 bits, however, it is possible to simulate keys with effective lengths between 1-1024 by doing something like this: http://php.net/...
6
votes
2answers
6k views

RC2, RC4, RC5 key length

While reading the Wiki page on RC4 I noticed that the key size must be in the range of 40–2,048 bits. So should I understand like this, that I can have a key that has length of, lets say 333 bits? (...
2
votes
1answer
678 views

How insecure in practice?

I am in attempt to understand relative insecurity of certain encryption schemes. Particularly of interest is DES and RC2. I know AES is better and should be used to encrypt. But practically, if ...