Mobile communication terminal

• US 20030114191A1
• Filed: 12/16/2002
• Published: 06/19/2003
• Est. Priority Date: 12/17/2001
• Status: Abandoned Application

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Nishimura, Hiroaki
• Application Number:
  US10/319,605
• Publication Number:
  US 20030114191A1
• Time in Patent Office: Days
• US Class Current: 455/557
• CPC Class Codes: H04L 63/0428 wherein the data content is protected, e.g. by encrypting or encapsulating the payload
• CPC Class Codes: H04W 12/03 Protecting confidentiality, e.g. by encryption
• CPC Class Codes: H04W 8/22 Processing or transfer of terminal data, e.g. status or physical capabilities
• CPC Class Codes: H04W 88/02 Terminal devices

Abstract

An encryption section encrypts arbitrary information based on specific information stored in an external storage medium. When information is to be stored in a storage section other than the external storage medium, a storage control section causes the encryption section to encrypt the information and the storage section to store the encrypted information. A decryption section decrypts the encrypted information based on the specific information stored in the external storage medium. When the encrypted information stored in the storage section is to be read, a read control section causes the decryption section to decrypt the encrypted information read from the storage section.

Claims

1. A mobile communication terminal, to which an external storage medium storing subscriber information can be arbitrarily attached and which can carry out communication as a terminal of a subscriber corresponding to the subscriber information stored in the attached external memory medium, the mobile communication terminal comprising:

encryption section configured to encrypt arbitrary information based on specific information stored in the attached external storage medium;

decryption section configured to decrypt the encrypted information based on the specific information stored in the attached external storage medium;

writing section configured to write the encrypted information in storage section other than the attached external storage medium; and

acquiring section configured to acquire the decrypted information as read-out information read from the storage section, the decrypted information being obtained by decrypting the encrypted information stored in the storage section.

2. The mobile communication terminal according to claim 1, wherein the storage section is fixedly incorporated therein.

3. The mobile communication terminal according to claim 1, wherein intrinsic information individually provided for the attached external storage medium is used as the specific information.

4. The mobile communication terminal according to claim 1, wherein the subscriber information is used as the specific information.

5. The mobile communication terminal according to claim 1, wherein information arbitrarily designated by a user is used as the specific information.

6. A mobile communication terminal, to which an external storage medium storing subscriber information can be arbitrarily attached and which can carry out communication as a terminal of a subscriber corresponding to the subscriber information stored in the attached external memory medium, the mobile communication terminal comprising:

management section configured to manage information stored in storage section other than the attached external storage medium in association with specific information stored in the attached external storage medium when the information was written in the storage section; and

reading section configured to read from the storage section only the information managed by the management section in association with the specific information stored in the attached external storage medium.

7. The mobile communication terminal according to claim 6, wherein the storage section is fixedly incorporated therein.

8. The mobile communication terminal according to claim 6, wherein intrinsic information individually provided for the attached external storage medium is used as the specific information.

9. The mobile communication terminal according to claim 6, wherein the subscriber information is used as the specific information.

10. The mobile communication terminal according to claim 6, wherein information arbitrarily designated by a user is used as the specific information.