Memory device, host device, and memory system
AssigneeSony Corporation
InventorsTakamichi Hayashi, Hiroshi Kuno, Munetake Ebihara
Life of this patent
Estimating the term…
Abstract
A memory device includes: a storage unit that stores public key information of a certificate authority for verifying a certificate and includes a secret area storing data of which secrecy is assured; and a control unit that controls access to the storage unit depending on reception information, wherein the reception information includes information where access control information is added to certificate information authenticated by the certificate authority, and the control unit verifies the certificate using the public key, identifies the access control information, and limits the accessible secret area in the storage unit.
Claims14
A memory device comprising:
- a storage unit that stores public key information of a certificate authority for verifying a certificate and includes a secret area storing data of which secrecy is assured;
- and
- a control unit that controls access to the storage unit depending on reception information,
- wherein the reception information includes information where access control information is added to certificate information authenticated by the certificate authority, and
- the control unit verifies the certificate using the public key, identifies the access control information, and limits the accessible secret area in the storage unit.
A host device comprising:
- a storage device that stores certificate information issued by at least a certificate authority;
- and
- a control unit that has a function to communicate with an external memory device including a secret area storing data of which secrecy in access and connection to the storage device is assured,
- wherein the control unit can transmit information in which access control information is added to certificate information by the communication function.
A memory system comprising:
- a host device;
- and
- a memory device that can communicate with the host device,
- wherein the host device includes
- a storage device that stores public key certificate information issued by at least a certificate authority;
- and
- a first control unit that has a function to communicate with an external memory device including a secret area storing data of which secrecy in access and connection to the storage device is assured,
- the first control unit can transmit information in which access control information is added to certificate information authenticated by a certificate authority as the certificate information, by the communication function,
- the memory device includes
- a storage unit that stores public key information of a certificate authority for verifying a certificate and includes a secret area storing data of which secrecy is assured;
- and
- a second control unit that controls access to the storage unit depending on the information in which access control information is added to the certificate information authenticated by the certificate authority, transmitted from the host device,
- the second control unit verifies the certificate using the public key, identifies the access control information, and limits the accessible secret area in the storage unit.
Dependencies are inferred from the claim text.