INFORMATION DELIVERY SYSTEM, ITS SERVER, INFORMATION PROCESSOR AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide an information delivery system, in which the address of a receiver is not specified directly but is specified on the condition of combination of attributes and information can be received only by a person satisfying that condition.

SOLUTION: The information delivery system comprises a server 10 managing a private key and a public key for specified attribute values, a user terminal 30 accessing the attribute management server 10 and acquiring an attribute private key corresponding to its own attributes created based on the private key, and a provider terminal 20 creating encrypted contents which can be decrypted by a user terminal 30 having an attribute private key for specified attributes using the public key. The provider terminal 20 delivers the encrypted contents, and the user terminal 30 decrypts the encrypted contents using its own attribute private key.

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