With my code I am able to define a plain text string, encrypt it with AES using a predefined key and IV and decrypt the result back into plain text (identical to the original plain text string). However, when I try to convert the same cypher text with online AES encryptors/decryptors with the same key the resulting text does not decrypt to the same original plain text. I also tried running the default "aes" example code on an arduino Uno, but got the same results.
Any help with this problem would be greatly appreciated.