| CPC H04L 63/20 (2013.01) | 20 Claims |

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1. A method in an apparatus, the method comprising:
receiving first information from an external time-sensitive network via a time sensitive network adaptor function included in the apparatus;
determining, using a session management function included in the apparatus, that enforcement of a security policy is to be implemented for user plane transfer of precision time protocol messages for a bridge session;
generating security information, based on the first information, by defining the security policy, the security policy identifying protection policies associated with the user plane transfer of precision time protocol messages;
storing the security information; and
transmitting the security information to at least one network node, the security information enabling the at least one network node to implement the security policy.
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