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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. | '''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''' | 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. | ||
==See | == Usage == | ||
* [[ | * [[.ctx]] | ||
* [[ | * [[.ekv]] | ||
[[Category:Programming]][[Category:Glossary]] | * [[.nuc]] | ||
==Encryption keys== | |||
{| class=standard-table | |||
!width=200| Game !! Key | |||
|- | |||
| [[Half-Life 2: Deathmatch]] | |||
|rowspan=2| x9Ke0BY7 | |||
|- | |||
| Source code default | |||
|- | |||
| [[Counter-Strike: Source]] AND [[Counter-Strike: Global Offensive]] || d7NSuLq2 | |||
|- | |||
| [[Day of Defeat: Source]] || Wl0u5B3F | |||
|- | |||
|rowspan=2| [[Team Fortress 2]] || E2NcUkG2 | |||
|- | |||
| A5fSXbf7 (<code>items.ctx</code> only) | |||
|- | |||
| [[Left 4 Dead 2]] || SDhfi878 | |||
|- | |||
| [[The Ship]] || eb3A4m79 | |||
|- | |||
|rowspan=2| [[Contagion]] || fUk0fF69 (.ctx weapon scripts) | |||
|- | |||
| 5!rrFz6p (.nuc [[VScript]]s) | |||
|- | |||
| [[Zombie Panic! Source]] || 5R0ni0pZ | |||
|- | |||
| [[Bloody Good Time]] || K4PeJwL7 (<code>pm_advertising.ctx</code>) | |||
|} | |||
==See also== | |||
* [[Vice]] - for instructions on encryption and decryption | |||
* [[ICE Key Generator]] | |||
[[Category:Programming]] | |||
[[Category:Glossary]] | |||
Latest revision as of 15:17, 27 January 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)
| |
| 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