👉 Undecipherable is a technical definition in cryptography that refers to a secret key or passphrase that cannot be deciphered by any known method. This can happen for various reasons, such as the use of algorithms that are not suitable for certain types of keys or the existence of an attacker who can easily crack the key without knowing it. Undecipherable keys are typically used in secure communication systems where encryption is a common means of data exchange, but they can still be vulnerable to attacks if the key