👉 In cryptography, "unperfidious" refers to a cryptographic key that is so secure that any attempt to break it would require an attacker to perform a significant amount of work beyond what is necessary to break the original encryption. This means that even if an attacker were able to gain access to the key, they would be unable to decrypt the data being transmitted or used for other purposes. Unperfidious keys are often used in secure communication channels such as internet protocols and digital signatures, where the