Access control method and storage apparatus
AssigneeFujitsu Limited
InventorIchiro Anzai
Life of this patent
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Abstract
An access control method controls access to a storage medium in a storage apparatus, by obtaining key data valid information which indicates whether or not a key data is valid, and enciphering data to be recorded in the storage medium using the key data only when the key data valid information is turned ON.
Claims24
An access control method for controlling access to a storage medium in a storage apparatus, comprising the steps of:
- obtaining key data valid information which indicates whether or not a key data is valid;
- and
- enciphering data to be recorded in the storage medium using the key data only when the key data valid information is turned ON.
An access control method for controlling access to a storage medium in a storage apparatus, comprising the steps of:
- obtaining key data valid information which indicates whether or not a key data is valid;
- and
- deciphering data reproduced from the storage medium using the key data only when the key data valid information is turned ON.
A storage apparatus comprising:
- a recording section recording data in a storage medium;
- an enciphering circuit;
- and
- a control unit, responsive to key data valid information which indicates whether or not a key data is valid, carrying out a control to supply data to be recorded in the storage medium to said recording section after enciphering the data by said enciphering circuit using the key data only when the key data valid information is turned ON, and bypassing said enciphering circuit to supply the data to be recorded in the storage medium to said recording section when the key data valid information is turned OFF.
A storage apparatus comprising:
- a reproducing section reproducing data from a storage medium;
- a deciphering circuit;
- and
- a control unit, responsive to key data valid information which indicates whether or not a key data is valid, carrying out a control to supply the data reproduced from the storage medium by said reproducing section to said deciphering circuit to decipher the reproduced data using the key data only when the key data valid information is turned ON, and bypassing said deciphering circuit so as not to decipher the reproduced data when the key data valid information is turned OFF.
A storage apparatus comprising:
- a recording section recording data in a storage medium;
- an enciphering circuit;
- and
- a switching circuit supplying the data to be recorded to said recording section after enciphering the data by said enciphering circuit using a key data or, supplying the data to be recorded to said recording section by bypassing said enciphering circuit, based on key data valid information which indicates whether or not the key data is valid.
A storage apparatus comprising:
- a reproducing section reproducing data from a storage medium;
- a deciphering circuit;
- and
- a switching circuit supplying the data reproduced from the storage medium by said recording section to said deciphering circuit to be deciphered using a key data or, bypassing said deciphering circuit, based on key data valid information which indicates whether or not the key data is valid.
A business method for providing a storage medium which is recorded with pay-contents enciphered using a key data, comprising the step of:
- turning OFF at an arbitrary timing key data valid information which must be turned ON when deciphering the enciphered pay-contents from the storage medium, so as to enable deciphering of the enciphered pay-contents only for a predetermined time.
Dependencies are inferred from the claim text.