Mobile terminal and data protection system
First Claim
1. A mobile terminal comprising:
- an IC card interface adapted to detachably mount an IC card including an encryption key to encrypt data, a decryption key to decrypt the data encrypted with the encryption key to the original data, and a decryption processing unit;
a data encryption processing unit which captures the encryption key from the IC card mounted and encrypts input data with the encryption key;
a storage device which stores the encrypted data supplied from the data encryption processing unit; and
a data decryption processing unit which decrypts the encrypted data read from the storage device in the decryption processing unit of the IC card by using the decryption key;
wherein a set of encryption key and decryption key, which is assigned to each IC card, is respectively different.
1 Assignment
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Accused Products
Abstract
A mobile terminal which is usable by a plurality of users enables only a regular user to browse data for the regular user of the mobile terminal.
An IC card 3 installed in a mobile terminal stores an encryption key 4 and a decryption key 5. Input data 10 is subjected to data encryption processing by using the encryption key 4 read from the IC card 3 to be transformed to encrypted data 14 and is then stored in a storage device 7. In addition, the encrypted data 14 read from the storage device 7 is subjected to decryption processing 6 in data decryption processing 200 by using the decryption key 5 to be decrypted to the original data. For different IC cards, different encryption keys 4 and different decryption keys 5 are assigned, and therefore, the data 14 will be subjected to the decryption processing 6 with a different decryption key 5. Consequently, the data 14 thus encrypted will not be decrypted correctly.
54 Citations
15 Claims
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1. A mobile terminal comprising:
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an IC card interface adapted to detachably mount an IC card including an encryption key to encrypt data, a decryption key to decrypt the data encrypted with the encryption key to the original data, and a decryption processing unit;
a data encryption processing unit which captures the encryption key from the IC card mounted and encrypts input data with the encryption key;
a storage device which stores the encrypted data supplied from the data encryption processing unit; and
a data decryption processing unit which decrypts the encrypted data read from the storage device in the decryption processing unit of the IC card by using the decryption key;
wherein a set of encryption key and decryption key, which is assigned to each IC card, is respectively different. - View Dependent Claims (2, 5, 6, 7, 8, 9)
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3. A mobile terminal comprising:
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an IC card interface adapted to detachably mount an IC card including an encryption key to encrypt data, a decryption key to decrypt the data encrypted with the encryption key to the original data, a encryption processing unit and a decryption processing unit;
a data encryption processing unit which encrypts input data in the encryption processing unit by using the encryption key of the IC card;
a storage device which stores the encrypted data supplied from the data encryption processing unit; and
a data decryption processing unit which decrypts the encrypted data read from the storage device in the decryption processing unit of the IC card by using the decryption key;
wherein a set of encryption key and decryption key, which is assigned to each IC card, is respectively different. - View Dependent Claims (4)
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10. A data protection system, wherein:
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an IC card includes an encryption key to encrypt data and a decryption key to decrypt the data encrypted with the encryption key to the original data;
input data is encrypted by using the encryption key captured from the IC card and stored in a storage device;
the stored encrypted data is decrypted in the IC card by using the decryption key; and
a set of encryption key and decryption key, which is assigned to each IC card, is respectively different. - View Dependent Claims (12, 13, 14, 15)
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11. A data protection system, wherein:
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an IC card includes an encryption key to encrypt data and a decryption key to decrypt the data encrypted with the encryption key to the original data;
input data is encrypted by using the encryption key in the IC card and stored in a storage device;
the stored encrypted data is decrypted in the IC card by using the decryption key; and
a set of encryption key and decryption key, which is assigned to each IC card, is respectively different.
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Specification