Keys for a Connectivity Process and a Security Protocol Process

A method performed by a first network node, the method comprising:

• performing a connectivity process with a user equipment (UE) to generate a first key for use by the UE and the first network node, wherein the UE performs the connectivity process using a UE identifier, and wherein performing the connectivity process comprises receiving, from the UE, a correlation identifier;
• storing the first key and the correlation identifier for the UE;
• and
• performing a security protocol process with the UE, wherein performing the security protocol process comprises receiving, from the UE, the correlation identifier, and
• using the correlation identifier to retrieve the first key.

A user equipment (UE) comprising:

• a processor;
• and
• a memory containing instructions executable by said processor whereby said processor controls the UE to:
• perform a connectivity process with a first network node to generate a first key for use by the UE and the first network node, wherein the UE performs the connectivity process using a UE identifier, and wherein performing the connectivity process comprises sending, to the first network node, a correlation identifier;
• and
• perform a security protocol process with the first network node using the first key, wherein performing the security protocol process comprises sending, to the first network node, the correlation identifier.

A network node comprising:

• a processor;
• and
• a memory containing instructions executable by said processor whereby the processor controls the network node to:
• perform a connectivity process with a user equipment, UE, to generate a first key for use by the UE and the first network node, wherein the UE performs the connectivity process using a UE identifier, and wherein performing the connectivity process comprises receiving, from the UE, a correlation identifier;
• store the first key and the correlation identifier for the UE;
• and
• perform a security protocol process with the UE, wherein performing the security protocol process comprises receiving, from the UE, the correlation identifier, and using the correlation identifier to retrieve the first key.