Method for generating device unique key, secret information LSI with secret information processing function using the method, host device mounted with the LSI, recording medium with authentication function used in the host device, and portable terminal with the recording medium having authentication function
First Claim
1. A method for generating a device unique key, comprising the steps of:
- integrating a fixed ID and a user ID so as to generate a device unique ID, the fixed ID being determined for a host device in advance and stored in a storage portion of the host device, the user ID being able to be determined desirably by a user; and
generating a device unique key based on the device unique ID.
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Accused Products
Abstract
To provide a device unique key for establishing a system for protecting a device unique ID including a user ID such as a phone number acquired from an external device when a host device such as a portable terminal is shipped or replaced, a change field information processing step 203 is a process for handing over designated change field information to a device unique ID generating step 205. In a user ID externally acquiring step 204, a user ID is acquired from an external device and stored in a host device. In the device unique ID generating step 205, the pieces of information (fixed ID, change field information and user ID) obtained in the encrypted fixed ID decryption processing step 202, the change field information processing step 203 and the user ID externally acquiring step 204 are integrated to generate a device unique ID. In a device unique key generating step 206, a device unique key is generated using the device unique ID generated in the device unique ID generating step 205.
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Citations
40 Claims
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1. A method for generating a device unique key, comprising the steps of:
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integrating a fixed ID and a user ID so as to generate a device unique ID, the fixed ID being determined for a host device in advance and stored in a storage portion of the host device, the user ID being able to be determined desirably by a user; and
generating a device unique key based on the device unique ID. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A device unique ID, comprising:
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a fixed ID, determined for a host device in advance; and
a user ID, capable of being desirably determined by a user;
wherein the fixed ID and the user ID are integrated with each other so that the device unique ID has a data structure which can be changed whenever the device unique ID is used. - View Dependent Claims (28)
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29. A secret information LSI, comprising:
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a secret information processing portion, generating a device unique ID;
wherein the device unique ID has a data structure in which a fixed ID determined for a host device in advance and a user ID which is capable of being desirably determined by the user are integrated with each other so that the data structure can be changed whenever the device unique ID is used. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40)
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Specification