# Obtaining a key that's using ice algorithm

I have a text file that has been processed by the SNOW steganography tool that uses ICE encryption. However, I do not know the key that would enable me to decrypt and retrieve the message hidden.

What tools are available, that are proven to have worked that would help me in retrieving the key?

Edited: instead of asking "what ways are there", I've changed to "what tools are there"

• Ummm... I don't see how detecting "when you have successfully retrieved the correct data" is any different with SNOW than with any kdf-cipher combination. $\:$ See crypto.stackexchange.com/questions/700/…. – user991 Feb 8 '13 at 8:52
• Conceivably, a brilliant cryptanalysis could guarantee almost-instant recovery of the key from a guess of a specific two of the plaintext blocks for a known ciphertext such that the hamming distance between the guess for those blocks and the actual plaintext for those blocks in at most 15. $\:$ (I'm not aware of any actual result anywhere near that for any computer-era cipher that was ever thought useful. $\:$ Also, as I mentioned in my answer, no useful cryptanalysis of ICE is known.) $\;\;$ – user991 Feb 11 '13 at 6:56
• I'm pretty sure there aren't any exiting tools that will do what you want. $\:$ – user991 Feb 11 '13 at 6:56