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Definition: OTP

(1) See one-time password.

(2) (One Time Programmable) Entering data and instructions into the types of chips where they cannot be erased. See PROM and antifuse.

(2) (One Time Pad) A cryptography method that uses a random number to generate a unique encryption key, which is stored on a smart card. See SwapCrypt.

(3) (Open Trading Protocol) A framework for Internet commerce that provides a consistent purchasing experience regardless of the hardware and software used.

(4) "On the phone." See digispeak.