A pad of keys for a cipher, each page being destroyed after one use, so that each message is sent using a different key.
More example sentences
- All the agent needs is an innocent looking radio and the right cipher to decode the message using the one-time pad cryptosystem.
- The classic example of a perfectly secure cipher system is the one-time pad.
- The first three digits of the message would indicate whether a live message was included for him, in which case he would scroll out the message, contained in five-digit groups, and decode the message using his one-time pad.