METHOD AND SYSTEM FOR PROVIDING AN ACCESS SPECIFIC KEY
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Accused Products
Abstract
An access specific key is provided for securing of a data transfer between a mobile terminal and a node of an access net. For authentication of the mobile terminal, a authentication server generates a session key, from which a basic key is derived and transferred to an interworking-proxy-server. The interworking-proxy-server derives the access specific key from the transferred basis key and provides the key to the node of the access net.
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Citations
52 Claims
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1-26. -26. (canceled)
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27. A method for providing an access-network-specific key for securing a data transfer between a mobile terminal and a node of an access network, comprising:
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generating, during authentication of the mobile terminal by an authentication server, a session key from which a base key is derived; transferring the base key from the authentication server to an interworking proxy server; deriving the access-network-specific key from the base key by the interworking proxy server; and providing the access-network-specific key from the interworking proxy server to the node of the access network. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44)
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45. An authentication server for providing a base key from which an access-network-specific key for securing a data transfer route between a mobile terminal and a node of an access network can be derived, comprising:
a programmed processor, during authentication of the mobile terminal, generating a session key, deriving a base key from the session key using a derivation function, and providing the base key to an interworking proxy server. - View Dependent Claims (46, 47)
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48. An interworking proxy for providing an access-network-specific key for securing a data transfer between a mobile terminal and a node of an access network, comprising:
a programmed processor deriving the access-network-specific key from a base key transferred by an authentication server and providing the access-network-specific key to the node of the access network. - View Dependent Claims (49, 50)
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51. A data transfer system used with a mobile terminal, comprising:
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a plurality of access networks and at least one home network of the mobile terminal; an authentication server of the home network, during authentication of a mobile terminal, generating a session key, deriving a shared base key from the session key and transferring the shared base key to the access networks; and interworking proxy servers, each in a respective access network, deriving from the base key at least one access-network-specific key respectively provided for securing a data transfer pathway between the mobile terminal and a node of the respective access network. - View Dependent Claims (52)
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Specification