locks 12 that include the same locking device 20 for example if a lock manufacturer uses 1500 different locking devices 20 each identified with a part number such as part numbers 0001 1500 the keywords 16 the locks 12 and associated part number of the locking devices 20 in the locks are tracked so that the same keyword 16 is never used on more than one lock 12 that included locking devices 20 with the same part number preferably a keyword 16 is never used more than once which may render unnecessary correlating and tracking the keywords 16 and locking devices 20 this means that the combination of the keyword 16 and the mating key 14 and lock 12 with the selected locking device 20 will be unique and not duplicated even when the manufacturer produces one million ten million twenty million or more locks with the keywords this also means that a user having a key 14 having a particular keyword 16 on it will only be able to open the one mating lock 12 with the matching keyword 16 this lack of duplication between the keywords keys and locks results in an increased security for the user fig2 is a list very short list approximately 80 keywords of potentially millions or billions of potential keywords 16 that can be used on the key 14 and lock 12 while the keywords 16 illustrated in fig2 are made up of a pair of english words the keywords 16 can be single words or can be.