Decryption of 20D and 30D firmware updates is possible.

ruevs

https://chdk.setepontos.com/d/134/10

mx3

decrypter30d worked also for 400D

so list of available decryptors:
20D, 350D
40D,
30D, 400D

Erpelwind

mx3
decrypter30d worked also for 400D

so list of available decryptors:
20D, 350D
40D,
30D, 400D

30D decryptor also works for 5D.

But where is that decryptor for 40D? I can't seem to find it (and this might also work for the EOS Mark III firmwares, they seem to have the same 288 byte header as the 40D firmware)...

mx3

Erpelwind
where is that decryptor for 40D? I can't seem to find it

decrypt40D.rar

10.04KB

Erpelwind

Thanks! (No luck with the Mark IIIs though, so probably they changed the key again.)