[25607] in cryptography@c2.net mail archive
the meaning of linearity, was Re: picking a hash function to be encrypted
daemon@ATHENA.MIT.EDU (Travis H.)
Sun May 14 21:17:25 2006
X-Original-To: cryptography@metzdowd.com
X-Original-To: cryptography@metzdowd.com
Date: Sun, 14 May 2006 19:39:30 -0500
From: "Travis H." <solinym@gmail.com>
To: Cryptography <cryptography@metzdowd.com>
> - Stream ciphers (additive)
This reminds me, when people talk about linearity with regard to a
function, for example CRCs, exactly what sense of the word do they
mean? I can understand f(x) =3D ax + b being linear, but how exactly
does XOR get involved, and are there +-linear functions and xor-linear
functions? Are they disjoint? etc.
--=20
"Curiousity killed the cat, but for a while I was a suspect" -- Steven Wrig=
ht
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