Android Question Checking AES encryption server side

Check for endianness issues. Try byteswapping the key, or message, or both.

please, do you have eventualy a link to let me analyse that decyphering methode ?

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You posted a link to VB code. its all there.... Not sure what your asking.

The difference I see, is the VB code is Rijndael, which isnt "exactly" AES.

See here:
https://stackoverflow.com/questions/748622/differences-between-rijndael-and-aes

The VB is using 32 bytes which is 256 bit. AES is 128 bit.

If your using the VB code as 128 bit, and it still doesnt work, then check for the endianness. I dont have the source code of B4XCipher, so I dont know if its little endian or big endian.

But the Endianness between the two systems have to be the same.

ok i understand, im going to go further in that way with the correct endianness
and if i m able to understand how works B4XCipher ...
Thanks

See this post, it may be helpful: https://www.b4x.com/android/forum/t...-vs-vb-net-2017-encryption.83598/#post-529673