Command authorization method
AssigneeFujitsu Limited
InventorsHideyuki Hirano, Takayuki Hasebe, Seigo Kotani
Life of this patent
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Abstract
A command authorization method that prevents a command issued by a third party from impersonating a command issued by a legitimate user, thereby maintaining high security. An authorization code stored in a command transmitted from a host is collated in a command authorization code parser. If the authorization code coincides with collating information therein, a command parser generates a predetermined access command, which is executed by a command controller.
Claims9
A method of authorizing commands transmitted from an electronic data command generator to an electronic data recording medium drive, comprising:
- generating a non-repeating authorization code to store in each commands transmission from a random number series table having a coordinate address;
- and by renewing the coordinate address with each commands transmission from the electronic data command generator to the electronic data recording medium drive;
- abstracting, in the electronic data recording medium drive, authorization information from the non-repeating authorization code stored in each received commands transmission;
- comparing, in the electronic data recording medium drive, the authorization information with collating information based upon a synchronized coordinate address of a random number series table shared with the electronic data command generator;
- and
- executing the received commands in the electronic data recording medium drive, if the authorization information coincides with the collating information.
A system, comprising:
- a host comprising a programmed computer processor generating a control command, generating a non-repeating command authorization code from at least one random number series table having coordinate addresses, appending the authorization code to the control command to produce an authorization code-attached control command, and transmitting the authorization code-attached control command to a recording device via an interface;
- and
- an electronic data recording device in communication with the host via the interface and abstracting authorization information from the non-repeating authorization codes in the received authorization code-attached control command based upon coordinate addresses of at least one host shared random number series table synchronized with the host, comparing the authorization information with collating information, and executing the control command, if the authorization information coincides with the collating information.
Dependencies are inferred from the claim text.