sha1 / crc 32 / md5 Hash editing

[caleman]

i got the program to edit the crc 32 numbers of files but i want to edit sha1 and md5 too....anyone know how and with what program can i do that? ty

[Soul]

Sorry but SHA-1 hash is a one-way process and is still consider safe until today. So, cracking/colliding SHA-1 hashes is not impossible, but difficult and time consuming. While MD5 was attacked and "broken", it requires some knowledge to collide the hash. I think 1.23 uses SHA-1 if i'm not wrong.

[Dekar]

A md5 collision costs about 20k$, sha1 would be even more expensive.
You'd have to rent the amazon cloud or an other supercomputer to do it!

[storyyeller]

You could probably do it cheaper using high end GPUs, but it would still cost a lot.

[Risen]

High-End CPU's aren't anywhere near quantum CPU's.

[storyyeller]

GPU not CPU

Graphics Processors are often faster then normal CPUs for certain kinds of problems, namely, brute force attacks, due to their parrellel nature. Researchers have already demonstrated using PS3s to generate MD5 collisions


Quantum computers aren't necessary if the problem size is small enough.