Definition: Undecoyed is a term in the field of cryptography and digital security. It refers to a type of message that cannot be decoded by an attacker, even if the sender or receiver can decrypt it using known techniques. This makes undecyded messages particularly useful for secure communication systems where the sender and receiver do not have access to each other's private keys or decryption tools. Undecoyed messages are often used in applications such as digital signatures, encryption, and authentication, where they serve