ICE: Difference between revisions
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For instructions on encryption and decryption, see [[Vice]]. The file format used by these encrypted files is [[CTX]]. | For instructions on encryption and decryption, see [[Vice]]. The file format used by these encrypted files is [[CTX]]. | ||
==Encryption keys== | |||
*'''[[Source SDK]] source code:''' x9Ke0BY7 | |||
{{Todo|Add keys for Valve games.}} | |||
==See Also== | ==See Also== | ||
Revision as of 06:30, 28 June 2011
ICE stands for Information Concealment Engine. It is a 64-bit private key block cipher, in the tradition of DES. However, unlike DES, it was designed to be secure against differential and linear cryptanalysis, and has no key complementation weaknesses or weak keys. In addition, its key size can be any multiple of 64 bits, whereas the DES key is limited to 56 bits.
Valve implemented ICE as a simple, and effective way of tamper-proofing a script file (using a 64-bit (8 bytes) key). You can ICE encrypt any file, as long as you have access to the code that loads it into the game.
For instructions on encryption and decryption, see Vice. The file format used by these encrypted files is CTX.
Encryption keys
- Source SDK source code: x9Ke0BY7
Todo: Add keys for Valve games.