Solved Backup encryption algorithm

[AlieChris]

Hello everyone !

I've looked for the information in the documentation and the forum but didn't find it.
Does anyone know which algoritm is used to encrypt the 3cx backups, when specifying a password ?

Thanks in advance,

 

[Saqqara]

As the backup file is a zip file, guessing it is AES-256 encryption

 

[AlieChris]

Hi,

That would be my guess too but zip file format supports AES-128, AES-256 and native Zip encryption, which is weak. So there are 3 choices, in addition to a home made / custom algorithm

On the other hand, AES encryption algorithms support any kind of passwords whereas 3CX backup encryption features limits passwords to alpha-numeric only, which weakens it a lot.

That raises a question : is it an algorithm-based or a 3CX implementation-based limitation ?

 

[NickD_3CX]

Does anyone know which algoritm is used to encrypt the 3cx backups, when specifying a password ?

AES 256

 

[AlieChris]

Thanks for the answer about the encryption algorithm Nick