the keyprefix in the binaries?

[Nobody/Anonymous]

hi there,

why the whole keyprefix appears in microcode.so, encoder, and decorer binaries?
I thout that the key should be splitted in two parts - something like public and private keys

[Karsten Richter]

microcode currently only uses symmetric encryption algorithms such as DES, DESede and AES.
What you are talking about are asymmetric aka public key crypto algorithms such as RSA.

The keyprefix ensures that only the encoder and decoder produced by the copyright owner are able to decrypt the file.

The second half of the key is stored in the encrypted file so that php can decrypt it without having to ask for any password. If the entire key was stored in the crypted file,
illegal copies can be made without the need to reproduce the exact decoder binary.

Regards

Karsten Richter