METHOD FOR BACKING UP SECRET KEY AND INFORMATION PROCESSING TERMINAL

摘要

PROBLEM TO BE SOLVED: To provide a method for securely restoring a secret key without a cost increase when an IC card is destroyed or missing.

SOLUTION: This invention in order to solve the problem provides: the method for backing up the secret key recorded on the IC card characterized in that dividing and encrypting data of the original secret key creates a plurality of divided encryption data and a plurality of other IC cards distributingly record the divided encryption data; and an information processing terminal that installs the method on a personal computer.

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