How can I alter the plaintext before decryption by changing the IV?
I know what the value of the plaintext should be. I also know the value of the IV (initial vector). The IV and the AES block are both 16 bytes long.
What I am trying to do is change what the plaintext will be into something meaningful.
"SEND ME THE DATA ENCRYPTED" is the plaintext and
"8f6f27b5dbfa2ba8367262bda7154d95" is IV.
I want to change the word
"ENCRYPTED". I can change everything before using by changing the IV it but I cannot change it.
This the message encrypted:
IV: 8f6f27b5dbfa2ba8367262bda7154d95 CT: 798e0ff8b06cc27c1591a4088531a64a9b76a9be87a3e944c6e7000f24f5b9f9