| 摘要 |
PURPOSE: An AAA(Authentication Authorization Accounting) long-term shared key refreshment method between a mobile node and a home diameter is provided to refresh a long-term shared key by adopting an authentication mechanism using the AAA long-term shared key shared between the moving node and the home diameter server using a diameter protocol. CONSTITUTION: According to the AAA long-term shared key refreshment method, a MIP(Mobile Internet Protocol) registration request message including AAA key request extension is transmitted when a moving node(10) wants to update MN(Mobile node)-AAA security connection. Only when a home AAA server(40) receives the MIP registration request message including the AAA key request extension, a key original random number(M-key) to be used in generating an AAA long-term shared key is generated and then a refreshed AAA long-term shared key is extracted from the generated key original random number. After determining a security algorithm and SPI(Security Parameter Index) and effective period of the key using the refreshed long-term shared key, the effective period of the key is judged. If the effective period of the key is a positive number, key refreshment is performed periodically when the effective period ends. Then, MIP MN-AAA key response extension corresponding to the MIP-MN AAA key request extension is proposed, and is included in a response message and then is provided to the mobile node through the diameter protocol. |
