发明名称 |
A METHOD AND APPARATUS FOR HANDLING KEYS USED FOR ENCRYPTION AND INTEGRITY |
摘要 |
A method and an arrangement for providing keys for protecting communication between a terminal (300) and service points in a communication network. A basic key (Ik) is first established with a service control node (304) when the terminal has entered the network. An initial modified key (Ik<SUB>1</SUB>) is then created in both the service control node and the terminal, by applying a predetermined first function (f) to at least the basic key and an initial value of a key version parameter (v). The initial modified key is sent to a first service point (302), such that it can be used to protect communication between the terminal and the first service point. When the terminal switches to a second service point (306), the first service point and the terminal both create a second modified key (Ik<SUB>2</SUB>) by applying a predetermined second function (g) to the initial modified key, and the first service point sends the second modified key to the second service point. |
申请公布号 |
WO2007111557(A1) |
申请公布日期 |
2007.10.04 |
申请号 |
WO2007SE00287 |
申请日期 |
2007.03.23 |
申请人 |
TELEFONAKTIEBOLAGET LM ERICSSON (PUBL);BLOM, ROLF;NORRMAN, KARL;NAESLUND, MATS |
发明人 |
BLOM, ROLF;NORRMAN, KARL;NAESLUND, MATS |
分类号 |
H04L29/06 |
主分类号 |
H04L29/06 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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