Un-ciphered network operation solution

摘要

The present invention relates to a solution for handling security issues of non access stratum (NAS) signaling in a telecommunications network. The NAS signaling is performed between a user equipment (UE) and a mobility management node, e.g. a mobility management entity (MME). The solution is realized in a device and in a method comprising steps of receiving an initial non access stratum message from the UE communicating wirelessly with the telecommunications network, determining security context status for the UE, determining if unciphered mode is to be used in the security context, set ciphering algorithm to a null ciphering algorithm, transmitting a security context and activation message to the UE, comprising information indicating ciphering algorithm, and receiving a security context activation acknowledge message from the UE.

主权项

1. A method for handling security issues in an infrastructure node in a telecommunications network, the method comprising:
storing, at the infrastructure node, a configuration parameter for use in selecting a ciphering algorithm from a set of predefined ciphering algorithms; receiving, at the infrastructure node, an initial non access stratum (NAS) message from a user equipment (UE) communicating wirelessly with the telecommunications network; after receiving the initial NAS message, determining that a security context needs to be created; in response to determining that a security context needs to be created, i) selecting a ciphering algorithm from said set of predefined ciphering algorithms based on said configuration parameter stored at the infrastructure node, wherein the selected ciphering algorithm is a Null ciphering algorithm and ii) after selecting the Null ciphering algorithm, transmitting to the UE a security command message comprising a ciphering algorithm identifier identifying the selected ciphering algorithm; and receiving from the UE a security context activation acknowledge message.