Electronic device, control method thereof, security program and others
First Claim
1. An electronic device, comprising:
- a mounting device which loads a portable recording medium; and
an encrypted information write device which writes encrypted information obtained by encrypting predetermined information using an electronic device unique key unique to the electronic device, and an electronic device unique key encrypted using a recording medium unique key unique to the recording medium, in the recording medium;
the electronic device further comprising;
an authentication device with authenticates medium identification information for identifying the recording medium, and device identification information for identifying the electronic device, in the case where the recording medium is mounted on the mounting device;
a key generating device which generates a common encryption key for encrypting or decrypting the electronic device unique key in accordance with the authentication result of the authentication device;
an encrypted information read device which reads the encrypted information recorded in the recording medium, and the encrypted electronic device unique key;
an acquiring device which forwards the read electronic device unique key to a control portion for the recording medium, and acquiring the electronic device unique key encrypted by the common encryption key from the control portion, after the electronic device unique key is decrypted by the recording medium unique key in the control portion;
a decryption execution device which decrypts the acquired electronic device unique key by the common encryption key, and executing the decryption of the encrypted information using the decrypted electronic device unique key; and
a control device which sets the electronic device in usable mode in the case where the encrypted information is decrypted by the decryption execution device.
1 Assignment
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Accused Products
Abstract
An electronic device, a control method thereof and a security program are provided which are capable of preventing or suppressing the theft of the electronic device. The electronic device comprises mounting means for loading a portable recording medium and encrypted information write means for encrypting predetermined information using an encryption key unique to the electronic device and writing the encrypted information in the recording medium. The electronic device further comprises encrypted information read means for reading the encrypted information recorded in the recording medium in the case where the recording medium is loaded in the mounting means, decryption execution means for executing the decryption of the encrypted information using the encryption key, and control means for setting the electronic device in usable mode in the case where the encrypted information is decrypted by the decryption execution means.
23 Citations
7 Claims
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1. An electronic device, comprising:
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a mounting device which loads a portable recording medium; and
an encrypted information write device which writes encrypted information obtained by encrypting predetermined information using an electronic device unique key unique to the electronic device, and an electronic device unique key encrypted using a recording medium unique key unique to the recording medium, in the recording medium;
the electronic device further comprising;
an authentication device with authenticates medium identification information for identifying the recording medium, and device identification information for identifying the electronic device, in the case where the recording medium is mounted on the mounting device;
a key generating device which generates a common encryption key for encrypting or decrypting the electronic device unique key in accordance with the authentication result of the authentication device;
an encrypted information read device which reads the encrypted information recorded in the recording medium, and the encrypted electronic device unique key;
an acquiring device which forwards the read electronic device unique key to a control portion for the recording medium, and acquiring the electronic device unique key encrypted by the common encryption key from the control portion, after the electronic device unique key is decrypted by the recording medium unique key in the control portion;
a decryption execution device which decrypts the acquired electronic device unique key by the common encryption key, and executing the decryption of the encrypted information using the decrypted electronic device unique key; and
a control device which sets the electronic device in usable mode in the case where the encrypted information is decrypted by the decryption execution device. - View Dependent Claims (2, 3, 4)
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5. A method of controlling an electronic device comprising:
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a mounting device which loads a portable recording medium; and
an encrypted information write device which writes encrypted information obtained by encrypting predetermined information using an electronic device unique key unique to the electronic device, and an electronic device unique key encrypted using a recording medium unique key unique to the recording medium, in the recording medium;
the method comprising the processes of;
authenticating medium identification information for identifying the recording medium, and device identification information for identifying the electronic device, in the case where the recording medium is mounted on the mounting device;
generating a common encryption key for encrypting or decrypting the electronic device unique key in accordance with the authentication result;
reading the encrypted information recorded in the recording medium, and the encrypted electronic device unique key;
forwarding the read electronic device unique key to a control portion for the recording medium, and acquiring the electronic device unique key encrypted by the common encryption key from the control portion, after the electronic device unique key is decrypted by the recording medium unique key in the control portion;
decrypting the acquired electronic device unique key by the common encryption key, and executing the decryption of the encrypted information using the decrypted electronic device unique key; and
setting the electronic device in usable mode in the case where the encrypted information is decrypted.
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6. A security program characterized in that a computer included in an electronic device comprising:
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a mounting device which loads a portable recording medium; and
an encrypted information write device which writes encrypted information obtained by encrypting predetermined information using an electronic device unique key unique to the electronic device, and an electronic device unique key encrypted using a recording medium unique key unique to the recording medium, in the recording medium;
is caused to function as;
authenticating medium identification information for identifying the recording medium, and device identification information for identifying the electronic device, in the case where the recording medium is mounted on the mounting device;
generating a common encryption key for encrypting or decrypting the electronic device unique key in accordance with the authentication result;
reading the encrypted information recorded in the recording medium, and the encrypted electronic device unique key;
forwarding the read electronic device unique key to a control portion for the recording medium, and acquiring the electronic device unique key encrypted by the common encryption key from the control portion, after the electronic device unique key is decrypted by the recording medium unique key in the control portion;
decrypting the acquired electronic device unique key by the common encryption key, and executing the decryption of the encrypted information using the decrypted electronic device unique key; and
setting the electronic device in usable mode in the case where the encrypted information is decrypted. - View Dependent Claims (7)
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Specification