A method for use in a wireless device, the method comprising: - registering (2102, 2104) a first connection and a second connection with an authentication management function, wherein the first connection connects via a first access network, the second connection connects via a second access network, and the first connection and the second connection share a first security context; - establishing a second security context with the AMF; - associating the second security context with a partial state before the second security context has been taken into use on either the first connection or the second connection, the partial state indicating that the second security context has not yet been taken into use on the first connection and that the second security context has not yet been taken into use on the second connection; - moving the second security context from the partial state to an intermediate state after the second security context has been taken into use on the first connection, the intermediate state indicating that the second security context has been taken into use on the first connection and that the second security context has not yet been taken into use on the second connection; - moving the second security context from the intermediate state to a full state after the second security context has been taken into use on the second connection, the full state indicating that the second security context has been taken into use on both the first connection and the second connection; - retaining the first security context prior to moving the second security context to the full state; - disposing of the first security context after moving the second security context to the full state; - performing a first Security Mode Command procedure over the first access network, wherein the first SMC procedure causes the second security context to be taken into use on the first connection; and - after performing the first SMC procedure, performing a second SMC procedure over the second access network, wherein the second SMC procedure causes the second security context to be taken into use on the second connection; wherein moving the second security context to the intermediate state occurs after performing the first SMC procedure and before performing the second SMC procedure, and moving the second security context to the full state occurs after performing the second SMC procedure. - registering (2102, 2104) a first connection and a second connection with an authentication management function, wherein the first connection connects via a first access network, the second connection connects via a second access network, and the first connection and the second connection share a first security context; - establishing a second security context with the AMF; - associating the second security context with a partial state before the second security context has been taken into use on either the first connection or the second connection, the partial state indicating that the second security context has not yet been taken into use on the first connection and that the second security context has not yet been taken into use on the second connection; - moving the second security context from the partial state to an intermediate state after the second security context has been taken into use on the first connection, the intermediate state indicating that the second security context has been taken into use on the first connection and that the second security context has not yet been taken into use on the second connection; - moving the second security context from the intermediate state to a full state after the second security context has been taken into use on the second connection, the full state indicating that the second security context has been taken into use on both the first connection and the second connection; - retaining the first security context prior to moving the second security context to the full state; - disposing of the first security context after moving the second security context to the full state; - performing a first Security Mode Command procedure over the first access network, wherein the first SMC procedure causes the second security context to be taken into use on the first connection; and - after performing the first SMC procedure, performing a second SMC procedure over the second access network, wherein the second SMC procedure causes the second security context to be taken into use on the second connection;