Abstract: Network equipment (300, 400) is configured for use in one of multiple different core network domains of a wireless communication system (10). The network equipment (300, 400) is configured to receive a message (60) that has been, or is to be, transmitted between the different core network domains The network equipment (300, 400) is also configured to apply inter-domain security protection to, or remove inter-domain security protection from, one or more portions of the content of a field in the message according to a protection policy (80). The protection policy (80) includes information indicating to which one or more portions of the content inter-domain security protection is to be applied or removed. The network equipment (300, 400) is also configured to forward the message (60), with inter-domain security protection applied or removed to the one or more portions, towards a destination of the message (60).

Abstract: A network function performs a method to identify an invalid subscription concealed identifier, SUCI. When the network function receives a message containing a SUCI, it determines a size of the SUCI contained in the received message, and also determines an expected size of the SUCI in the received message. The network function then determines whether the size of the SUCI contained in the received message satisfies a criterion associated with the expected size. If the size of the SUCI contained in the received message does not satisfy the criterion associated with the expected size, the network function determines that the SUCI in the received message is invalid, and it rejects the SUCI in the received message if it is determined to be invalid.

Abstract: In order to ensure that a Subscription Concealed Identifier, SUCI, is calculated in the Universal Subscriber Identity Module, USIM, part of a User Equipment, UE, when intended, when a SUCI-Calculation-Indicator is set to a value indicating that the SUCI should be calculated in the USIM, a network node sets proprietary information, which is not known to a Mobile Equipment, ME, part of the UE, as required for calculation of the SUCI. The USIM facilitates calculation of the SUCI in the ME part of the UE only when the SUCI-Calculation-Indicator is set to a value indicating that the SUCI should be calculated in the ME. When the SUCI-Calculation-Indicator is set to a value indicating that the SUCI should be calculated in the USIM, the ME part deletes any locally stored information required for calculation of the SUCI.

Abstract: A wireless device requests a network slice from a network by, first, identifying at least one network slice to be requested. Based on a mapping method that is specific to the wireless device, the wireless device forms a slice pseudonym for the or each network slice to be requested. The wireless device then transmits a request message to the network, wherein the request message comprises the or each slice pseudonym. The network node receives the request message sent by the wireless device, wherein the request message comprises at least one slice pseudonym. Based on a mapping method that is used by the wireless device and that is specific to the wireless device, the network node identifies at least one requested network slice from the or each received slice pseudonym. The network node then permits use of the requested network slice.

Abstract: In order to ensure that a Subscription Concealed Identifier, SUCI, is calculated in the Universal Subscriber Identity Module, USIM, part of a User Equipment, UE, when intended, when a SUCI-Calculation-Indicator is set to a value indicating that the SUCI should be calculated in the USIM, a network node sets proprietary information, which is not known to a Mobile Equipment, ME, part of the UE, as required for calculation of the SUCI. The USIM facilitates calculation of the SUCI in the ME part of the UE only when the SUCI-Calculation-Indicator is set to a value indicating that the SUCI should be calculated in the ME. When the SUCI-Calculation-Indicator is set to a value indicating that the SUCI should be calculated in the USIM, the ME part deletes any locally stored information required for calculation of the SUCI.

Abstract: A radio access network, RAN, node configures user plane access stratum, AS, security in a wireless communication system that includes a radio access network, RAN, and a core network, CN. The RAN node is configured to receive, from the CN, signaling that indicates a decision by the CN of whether or not the RAN node is to activate user plane AS security and that indicates whether or not the RAN node is allowed to overrule the decision by the CN. For example, the signaling may indicate whether the decision by the CN is a command that the RAN node must comply with or a preference that the RAN node is permitted to overrule. Regardless, the RAN node may also be configured to activate or not activate user plane AS security, depending on the signaling.

Abstract: A radio access network, RAN, node (12) configures user plane access stratum, AS, security in a wireless communication system (10) that includes a radio access network, RAN, (10B) and a core network, CN (10A). The RAN node (12) is configured to receive, from the CN (10A), signaling (20) that indicates a decision by the CN (10A) of whether or not the RAN node (12) is to activate user plane AS security and that indicates whether or not the RAN node (12) is allowed to overrule the decision by the CN (10A). For example, the signaling (20) may indicate whether the decision by the CN is a command that the RAN node (12) must comply with or a preference that the RAN node (12) is permitted to overrule. Regardless, the RAN node (12) may also be configured to activate or not activate user plane AS security, depending on the signaling (20).

Abstract: In order to ensure that a Subscription Concealed Identifier, SUCI, is calculated in the Universal Subscriber Identity Module, USIM, part of a User Equipment, UE, when intended, when a SUCI-Calculation-Indicator is set to a value indicating that the SUCI should be calculated in the USIM, a network node sets proprietary information, which is not known to a Mobile Equipment, ME, part of the UE, as required for calculation of the SUCI. The USIM facilitates calculation of the SUCI in the ME part of the UE only when the SUCI-Calculation-Indicator is set to a value indicating that the SUCI should be calculated in the ME. When the SUCI-Calculation-Indicator is set to a value indicating that the SUCI should be calculated in the USIM, the ME part deletes any locally stored information required for calculation of the SUCI.

Abstract: A method performed by an authentication server in a home network of a UE for obtaining a subscription permanent identifier, SUPI. The method comprises: receiving a SUCI which comprises an encrypted part in which at least a part of the SUPI is encrypted, and a clear-text part which comprises a home network identifier and an encryption scheme identifier that identifies an encryption scheme used by the UE to encrypt the SUPI in the SUCI; determining a de-concealing server to use to decrypt the encrypted part of the SUCI; sending the SUCI to the de-concealing server; and receiving the SUPI in response. Methods performed by a UE and a de-concealing server are also disclosed. Furthermore, UEs, de-concealing servers, authentication servers, computer program and a memory circuitry are also disclosed.

Abstract: A method performed by an authentication server in a home network of a UE for obtaining a subscription permanent identifier, SUPI. The method comprises: receiving a SUCI which comprises an encrypted part in which at least a part of the SUPI is encrypted, and a clear-text part which comprises a home network identifier and an encryption scheme identifier that identifies an encryption scheme used by the UE to encrypt the SUPI in the SUCI; determining a de-concealing server to use to decrypt the encrypted part of the SUCI; sending the SUCI to the de-concealing server; and receiving the SUPI in response. Methods performed by a UE and a de-concealing server are also disclosed. Furthermore, UEs, de-concealing servers, authentication servers, computer program and a memory circuitry are also disclosed.

Abstract: In order to ensure that a Subscription Concealed Identifier, SUCI, is calculated in the Universal Subscriber Identity Module, USIM, part of a User Equipment, UE, when intended, when a SUCI-Calculation-Indicator is set to a value indicating that the SUCI should be calculated in the USIM, a network node sets proprietary information, which is not known to a Mobile Equipment, ME, part of the UE, as required for calculation of the SUCI. The USIM facilitates calculation of the SUCI in the ME part of the UE only when the SUCI-Calculation-Indicator is set to a value indicating that the SUCI should be calculated in the ME. When the SUCI-Calculation-Indicator is set to a value indicating that the SUCI should be calculated in the USIM, the ME part deletes any locally stored information required for calculation of the SUCI.

Abstract: A method performed by an authentication server in a home network of a UE for obtaining a subscription permanent identifier, SUPI. The method comprises: receiving a SUCI which comprises an encrypted part in which at least a part of the SUPI is encrypted, and a clear-text part which comprises a home network identifier and an encryption scheme identifier that identifies an encryption scheme used by the UE to encrypt the SUPI in the SUCI; determining a de-concealing server to use to decrypt the encrypted part of the SUCI; sending the SUCI to the de-concealing server; and receiving the SUPI in response. Methods performed by a UE and a de-concealing server are also disclosed. Furthermore, UEs, de-concealing servers, authentication servers, computer program and a memory circuitry are also disclosed.