ENCRYPTION SYSTEM AND HARDLOCK DEVICE USED THEREIN

A code system comprising a temperature-resistance conversion element the change of electric resistance value of which describes a hysteresis loop with respect to a temperature change; a means for changing the temperature of said temperature-resistance conversion element; a means for detecting the ch...

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Bibliographische Detailangaben
Hauptverfasser:	HIGO YAKICHI, MORIMOTO KAN
Format:	Patent
Sprache:	eng
Schlagworte:	ACCESSORIES THEREFOR ADVERTISING ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDEDFOR ELSEWHERE CALCULATING CHECKING-DEVICES CODING OR CIPHERING APPARATUS FOR CRYPTOGRAPHIC OR OTHERPURPOSES INVOLVING THE NEED FOR SECRECY COIN-FREED OR LIKE APPARATUS COMPUTING COUNTING CRYPTOGRAPHY DISPLAY EDUCATION FIXED CONSTRUCTIONS GENERATING RANDOM NUMBERS HANDCUFFS HANDLING RECORD CARRIERS KEYS LOCKS PHYSICS PRESENTATION OF DATA RECOGNITION OF DATA RECORD CARRIERS REGISTERING OR INDICATING THE WORKING OF MACHINES SAFES SEALS TIME OR ATTENDANCE REGISTERS VOTING OR LOTTERY APPARATUS WINDOW OR DOOR FITTINGS
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Beschreibung
Zusammenfassung:	A code system comprising a temperature-resistance conversion element the change of electric resistance value of which describes a hysteresis loop with respect to a temperature change; a means for changing the temperature of said temperature-resistance conversion element; a means for detecting the change of the electric resistance of said conversion element; and a time counting means for counting the actuation time of said temperature changing means. A hard lock device for use in the code system is also disclosed.