ENCIPHERING SYSTEM IN NETWORK COMPUTING SYSTEM AND CRYPTOGRAPHIC KEY MANAGEMENT METHOD IN THE SAME SYSTEM AND STORAGE MEDIUM

摘要

PROBLEM TO BE SOLVED: To realize a highly reliable cryptographic key managing function by providing a network key managing function in addition to a local key managing function and a function for identifying which cryptographic key of a local key and a network key the data on a terminal equipment are enciphered by. SOLUTION: This system is provided with a network key managing function for managing a network key through a network on a server in addition to a local key managing function, and a function for identifying which of a local key and a network key the data on a terminal equipment are enciphered by. An encipherment program 123 obtains a local key 124 or a network key 125 stored in a memory 12 from a client program 126 when the operator of a terminal equipment 1 issues a request for encipherment for an arbitrary non- encipherment data 121 among an non-encipherment data set 151 stored in an outside storage device 15. Which key should be obtained is judged by checking the attribute of the objective data by the encipherment program 123.