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US 8,559,633 B2Granted
Method and device for generating local interface key
AssigneeHuawei Technologies Co., Ltd.
InventorsYanmei Yang, Shuhua Cao
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Abstract
A method for generating a local interface key includes: generating a variable parameter; and deriving the local interface key, according to the variable parameter generated and related parameters for calculating the local interface key. The method simplifies the process in which the terminal obtains the local interface key and the system resources are saved. Moreover, the local interface key is derived through the variable parameter and the valid key information. Thus, the security level between the UICC and the terminal is ensured.
Claims14
A method, comprising:
- obtaining, by a User Integrate Circuit Card (UICC), a variable parameter from a terminal, the variable parameter being generated by the terminal;
- and
- deriving, by the UICC, a local interface key for the UICC, wherein the local interface key for the UICC is for the UICC to securely communicate with the terminal,
- wherein the local interface key for the UICC is derived by the UICC in accordance with the obtained variable parameter, key identity information, and related parameters for calculating the local interface key, by adopting a key derivation algorithm, and
- wherein the local interface key for the UICC derived by the UICC is the same as a local interface key for the terminal, the local interface key for the terminal being used for the terminal to securely communicate with the UICC and being generated by adopting the same key derivation algorithm as that adopted by the UICC to derive the local interface key for the UICC.
2 more elements
A User Integrate Circuit Card (UICC), comprising:
- a processor configured to derive a local interface key for the UICC, wherein the local interface key for the UICC is used for securely protecting the UICC to communicate with a terminal,
- wherein the local interface key for the UICC is derived by using a variable parameter received from the terminal, key identity information, and related parameters for calculating the local interface key for the UICC, by adopting a key derivation algorithm, wherein the variable parameter is generated by the terminal, and
- wherein the local interface key for the UICC is same as a local interface key for the terminal, the local interface key for the terminal being used for the terminal to communicate with the UICC and being derived by adopting the same key derivation algorithm as that adopted by the UICC to derive the local interface key for the UICC.
Dependencies are inferred from the claim text.