Patent ID: 8819765

Claim:
A method of providing security for a communication terminal having an association with a first communication network but being present in a second communication network, the method comprising the following steps being executed by a communication network entity in the second communication network: receiving a first security policy vector Ph associated with the first communication network from the first communication network, the first security policy vector Ph comprising a predefined number of values relating to at least one of a security algorithm and a security function; generating a second security policy vector Pv associated with the second communication network, the second security vector Pv comprising the same predefined number of values as the first security policy vector Ph, the values also relating to at least one of a security algorithm and a security function; transmitting the first security policy vector Ph and the second security vector Pv to the communication terminal; selecting at least one security algorithm or at least one security function in accordance with the first security policy vector Ph and the second security policy vector Pv; and informing the communication terminal the result of the selection.