Access control system, registration apparatus, reference apparatus, access control method, and computer readable medium
AssigneeMitsubishi Electric Corporation
InventorsMitsuhiro MATSUMOTO, Masafumi YAMADA, Kazuki WATANABE
Life of this patent
Estimating the term…
Abstract
A registration apparatus encrypts a content identifier that identifies content using a group common key for a group that is configured of a plurality of members who are granted access to the content, and registers an encrypted content identifier. A reference apparatus obtains the encrypted content identifier, decrypts the content identifier from the encrypted content identifier using the group common key, and obtains the content using the content identifier.
Claims10
An access control system comprising:
- processing circuitry to execute:
- a content registration process to associate content with a content identifier that identifies the content, to register the content without encrypting, to encrypt the content identifier using a group common key for a group that is configured of a plurality of members who are granted access to the content, and to register an encrypted content identifier;
- and
- a content obtaining process to obtain the encrypted content identifier, to decrypt the content identifier from the encrypted content identifier using the group common key, and to obtain the content using the content identifier.
An access control method comprising:
- associating content with a content identifier that identifies the content, registering the content without encrypting, encrypting the content identifier using a group common key for a group that is configured of a plurality of members who are granted access to the content, and registering an encrypted content identifier, by a registration apparatus;
- and
- obtaining the encrypted content identifier, decrypting the content identifier from the encrypted content identifier using the group common key, and obtaining the content using the content identifier, by a reference apparatus.
A non-transitory computer readable medium storing an access control program
- for causing a computer that operates as a registration apparatus to execute:
- a content registration process to associate content with a content identifier that identifies the content, to register the content without encrypting, to encrypt the content identifier using a group common key for a group that is configured of a plurality of members who are granted access to the content, and to register an encrypted content identifier;
- and
- for causing a computer that operates as a reference apparatus to execute:
- a content obtaining process to obtain the encrypted content identifier, to decrypt the content identifier from the encrypted content identifier using the group common key, and to obtain the content using the content identifier.
Dependencies are inferred from the claim text.