I am new to this encryption and decryption stuff, so i was playing with this library to get a idea on how it works.
My questions is why does the decryption function require the original unencrpyted plain message? Should it not be requesting the key and the cypher to decrypt it?
If I encrpted a message on one arduino and sent the cypher to another arduino with the keys hard coded into each seperate program how would i decrpyt the message on the second arduino? I wouldn't want to send the plain text in the message because then it defeats the purpose of encrypting in the first place.