Abstract:
Telegraphy message security system relies on the
privacy and authentication of information, which requires
implementation of cryptographic functions, and measures are
needed to protect data during their transmission. A hashing
algorithm MD5 accepts an arbitrary length telegraphy message
as input and produces a fixed-sized hash value or message
digest. To authenticate a message, the sender computes a hash
value for the message. Then, the message is encrypted to ensure
that only the legal recipient can read the message contents and
send the encrypted message and hash value. The receiver
decrypts the incoming message. Then, it regenerates a new hash
value from the decrypted message and compares the new hash
value with the received hash value. If the message has been
altered in transmit , there will be a mismatch.
