👉 The term "nondirigible" is often used in cryptography, particularly in the context of public key infrastructure (PKI) and digital signatures. It refers to a type of cryptographic security where it is impossible to forge or reverse-engineer the original message without the knowledge of the recipient. In other words, if you have a non-rigorous proof of a signature, it means that no one can accurately determine the actual message from the signature alone, and thus cannot forge or tamper
