ICE: Difference between revisions
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Thunder4ik (talk | contribs) m (→Encryption keys: Unicodifying) |
(Fortress Forever used to use encryption, but then didn't... Don't know what prompted them to axe it.) |
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== Usage == | == Usage == | ||
* [[.ctx]] | * [[.ctx]] | ||
* [[.ekv]] | |||
* [[.nuc]] | * [[.nuc]] | ||
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|- | |- | ||
| A5fSXbf7 (<code>items.ctx</code> only) | | A5fSXbf7 (<code>items.ctx</code> only) | ||
|- | |||
| [[Fortress Forever]] (pre-Greenlight) || saxEWr5v | |||
|- | |- | ||
| [[Left 4 Dead 2]] || SDhfi878 | | [[Left 4 Dead 2]] || SDhfi878 | ||
| Line 33: | Line 36: | ||
|- | |- | ||
| [[Zombie Panic! Source]] || 5R0ni0pZ | | [[Zombie Panic! Source]] || 5R0ni0pZ | ||
|- | |||
| [[Bloody Good Time]] || K4PeJwL7 (<code>pm_advertising.ctx</code>) | |||
|} | |} | ||
Latest revision as of 07:23, 5 October 2025
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 |
|---|---|
| Half-Life 2: Deathmatch | x9Ke0BY7 |
| Source code default | |
| Counter-Strike: Source AND Counter-Strike: Global Offensive | d7NSuLq2 |
| Day of Defeat: Source | Wl0u5B3F |
| Team Fortress 2 | E2NcUkG2 |
A5fSXbf7 (items.ctx only)
| |
| Fortress Forever (pre-Greenlight) | saxEWr5v |
| Left 4 Dead 2 | SDhfi878 |
| The Ship | eb3A4m79 |
| Contagion | fUk0fF69 (.ctx weapon scripts) |
| 5!rrFz6p (.nuc VScripts) | |
| Zombie Panic! Source | 5R0ni0pZ |
| Bloody Good Time | K4PeJwL7 (pm_advertising.ctx)
|
See also
- Vice - for instructions on encryption and decryption
- ICE Key Generator