Storage apparatus and access control method
First Claim
1. A storage apparatus capable of using a storage medium having at least a first region for storing therein data and a second region for storing therein both use permission discrimination information indicative of permission of a predetermined access operation and use limit information with respect to said storage medium, comprising:
- a reading unit for reading said use limit information from said second region of said storage medium prior to an access to said storage medium;
a collating unit for collating use permission discrimination information provided for a comparison purpose with said use permission discrimination information read out from said second region of said storage medium in the case that said use limit information indicates an access not-allowed condition; and
a writing unit for rewriting said use limit information on said second region into such information indicative of an access allowed condition when it is confirmed by the collation that the former use permission discrimination information coincides with the latter use permission discrimination information read out from the second region.
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Accused Products
Abstract
A storage apparatus is capable of using a storage medium having at least a first region for storing therein data and a second region for storing therein both use permission discrimination information indicative of permission of a predetermined access operation and use limit information with respect to the storage medium. The storage apparatus comprises a reading unit for reading the use limit information from the second region of the storage medium prior to an access to the storage medium, a collating unit for collating use permission discrimination information provided for a comparison purpose with the use permission discrimination information read out from the second region of the storage medium in the case that the use limit information indicates an “access not-allowed condition”, and a writing unit for rewriting the use limit information into such information indicative of an “access allowed condition” when it is confirmed by the collation that the former use permission discrimination information coincides with the latter use permission discrimination information read out from the second region. As a result, an unauthorized use of the storage medium is prevented, improving security.
31 Citations
18 Claims
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1. A storage apparatus capable of using a storage medium having at least a first region for storing therein data and a second region for storing therein both use permission discrimination information indicative of permission of a predetermined access operation and use limit information with respect to said storage medium, comprising:
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a reading unit for reading said use limit information from said second region of said storage medium prior to an access to said storage medium;
a collating unit for collating use permission discrimination information provided for a comparison purpose with said use permission discrimination information read out from said second region of said storage medium in the case that said use limit information indicates an access not-allowed condition; and
a writing unit for rewriting said use limit information on said second region into such information indicative of an access allowed condition when it is confirmed by the collation that the former use permission discrimination information coincides with the latter use permission discrimination information read out from the second region. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A storage apparatus capable of using a storage medium having at least a first region for storing therein data, and a second region for storing therein use permission discrimination information used to permit an access operation, comprising:
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a reading unit for reading said use permission discrimination information from said second region of said storage medium;
a collating unit for collating use permission discrimination information provided for a comparison purpose with said use permission discrimination information read from said second region; and
a rewrite control unit for allowing to rewrite use limit number information recorded on said second region so as to correspond to said use permission discrimination information when it is confirmed by the collation that the former use permission discrimination information coincides with the latter use permission discrimination information read out from the second region, said use limit number information being used to limit the access to said storage medium. - View Dependent Claims (9, 10, 11, 12)
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13. An access control method applicable to such a storage apparatus capable of using a storage medium having at least a first region for storing therein data and a second region for storing therein both use permission discrimination information indicative of permission of a predetermined access operation and use limit information with respect to said storage medium, said method comprising the steps of:
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reading said use limit information from said second region of said storage medium prior to an access operation with respect to said storage medium;
collating use permission discrimination information provided for a comparison purpose with said use permission discrimination information read out from said second region of said storage medium in the case that said use limit information indicates an access not-allowed condition; and
rewriting said use limit information on said second region into such information indicative of an access allowed condition when it is confirmed by the collation that the former use permission discrimination information coincides with the latter use permission discrimination information read out from the second region. - View Dependent Claims (14, 15)
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16. An access control method applicable to such a storage apparatus capable of using a storage medium having at least a first region for storing therein data, and a second region for storing therein use permission discrimination information used to permit an access operation, said method comprising the steps of:
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reading said use permission discrimination information from said second region of said storage medium;
collating use permission discrimination information provided for a comparison purpose with said use permission discrimination information read from said second region; and
allowing to rewrite use limit number information recorded on said second region so as to correspond to said use permission discrimination information when it is confirmed by the collation that the former use permission discrimination information coincides with the latter use permission discrimination information read out from the second region, said use limit number information being used to limit the access to said storage medium. - View Dependent Claims (17, 18)
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Specification