Hey all,

has anyone on this board given a look to RC4 ? Anyone had any ideas
or successes with it ?

Cheers,
Halvar

What do you mean? It's a stream cipher with some pretty-well understood attacks, but if you avoid those, it's still secure.

http://www.ipa.go.jp/security/enc/CRYPTREC/fy15/doc/1043_IPA-RC4_%20report_final.pdf

What I mean is what I wrote: Has anyone on this board spent time
attacking RC4 ? There has been a lot of (fairly serious) discussion of
MD5-like schemes on the board recently, and I have spent some time
on it (while I made no progress on the full version, I did end up learning
a lot about solving narrow T-functions as in the puzzle I posted, and I
understand now why the bit rotations are absolutely crucial to MD4/MD5).
From this I assumed that other people on this board might have tried
to deal with RC4 -- it's one of the simpler ciphers (in design), and due
to it's boardgame-like characteristics and simplicity I am just curious if
somebody has tried banging his head against it, and if they've come up
with anything funny/interesting on their way there.

Cheers,
Halvar