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BlueGreycalmElegant

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/trunk/Obfuscation.md
27,10 → 27,11
Introduced in **Filter Foundry 1.7.0.8**
Obfuscation version 5 is the same as version 4, but there is a constraint
that the seed must be equal to the hash of the deobfuscated PARM.
that the seed must be equal to the CRC32b checksum of the deobfuscated PARM.
This is done to check the integrity of the deobfuscation.
Also, the xor-shifting is intentionally incompatible with version 4
to avoid downgrade-attacks.
(to avoid downgrade-attacks) by XORing the initial seed with 0xFFFFFFFF.
### Obfuscation "Version 4"