| 摘要 |
A data processing system comprises a plurality of key production modules each of which stores keys required to encrypt data and decrypt the encrypted data, produces a new key, encrypts the newly produced key by using one of the keys stored therein as a master key, and stores the encrypted key therein. The data processing system comprises a key replication unit that, upon producing a new key in one of the key production modules serving as a source key production module, urges the source key production module to encrypt the newly produced key by using one of the keys stored in another of the remaining key production modules serving as a destination key production module, and then stores the encrypted key in the destination key production module, thereby executing a key replication process.
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