ICE
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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.
Usage
Encryption keys
| Game | Key |
|---|---|
| Source code default | x9Ke0BY7 |
| Half-Life 2: Deathmatch | |
| Bloody Good Time | K4PeJwL7 (pm_advertising.ctx)
|
| Contagion | fUk0fF69 (.ctx weapon scripts) |
| 5!rrFz6p (.nuc VScripts) | |
| Counter-Strike: Source Counter-Strike: Global Offensive Counter-Strike 2 |
d7NSuLq2 |
| Counter-Strike ProMod | H1aRQ0n1 |
| Day of Defeat: Source | Wl0u5B3F |
| Dystopia (1.2) | pH3apO8w |
| Dystopia (1.3) | G8stUh3F |
| Fairy Tale Busters | E2NcUkG2 |
| Fortress Forever (pre-Greenlight) | saxEWr5v |
| GoldenEye: Source | Gr3naDes |
| Half-Life 2: Capture The Flag | R1dj3axP |
| Insurgency | DrA5e3EB |
| Left 4 Dead 2 | SDhfi878 |
| No More Room in Hell | lREeeapA |
| Nuclear Dawn | TA+*veh9 |
| Tactical Intervention | 71B4Dt1Z |
| Team Fortress 2 | E2NcUkG2 |
A5fSXbf7 (items.ctx only)
| |
| The Ship | eb3A4m79 |
| Valve Tracker (Steam Friends 2004) |
\rU\xf3\xd3\xad\x06WG |
| Zombie Panic! Source | 5R0ni0pZ |
See also
- Vice - for instructions on encryption and decryption
- ICE Key Generator