keying sequence
noun Cryptography.
a sequence made up of letters or numbers that can encode or decode a polyalphabetic substitution cipher one letter at a time.
Origin of keying sequence
First recorded in 1940–45
Words nearby keying sequence
keyed,
keyes technique,
keyhole,
keyhole saw,
keyhole surgery,
keying sequence,
keyless,
keylock,
keylogger,
keylogging,
keyman