Abstract: At given user equipment in a communication system, a unified subscription identifier data structure is constructed. The unified subscription identifier data structure includes a plurality of fields that specify information for a selected one of two or more subscription identifier types and selectable parameters associated with the selected subscription identifier type, and wherein the information in the unified subscription identifier data structure is useable by the given user equipment to access one or more networks associated with the communication system based on an authentication scenario corresponding to the selected subscription identifier type. For example, during different authentication scenarios, the given user equipment utilizes the unified subscription identifier data structure to provide the appropriate subscription identifier (e.g., SUPI, SUCI or IMSI) and associated parameters for the given authentication scenario.

Abstract: There is provided a method comprising, receiving, from a second network node, a request to access data of a user of a user device, forwarding the request to the user device, receiving, from the user device, an acknowledgement indicating that access to the data of the user is granted and transmitting, in response to receiving the acknowledgement, a first indication to a blockchain, the first indication indicating that access to the data of the user is granted.

Abstract: According to an example aspect of the present invention, there is provided a method comprising, generating a first and a second share of a private key associated with a terminal, generating a moduli-set associated with the terminal, transmitting the first share to a second network element and the second share to a third network element, receiving, from the second network element, a message comprising an indication that an investigation has started related to the terminal and transmitting the moduli-set associated with the terminal to the second network element.

Abstract: According to an example aspect of the present invention, there is provided a cryptoprocessor comprising physical unclonable function circuitry comprising at least one physical unclonable function, and at least one processing core configured to process a challenge received from outside the cryptoprocessor by at least deriving a response to the challenge by providing the challenge as input to the physical unclonable function circuitry, using the response as an encryption key to encrypt a second encryption key, and by causing the encrypted second encryption key to be provided to a party which issued the challenge.

Abstract: At given user equipment in a communication system, a unified subscription identifier data structure is constructed. The unified subscription identifier data structure includes a plurality of fields that specify information for a selected one of two or more subscription identifier types and selectable parameters associated with the selected subscription identifier type, and wherein the information in the unified subscription identifier data structure is useable by the given user equipment to access one or more networks associated with the communication system based on an authentication scenario corresponding to the selected subscription identifier type. For example, during different authentication scenarios, the given user equipment utilizes the unified subscription identifier data structure to provide the appropriate subscription identifier (e.g., SUPI, SUCI or IMSI) and associated parameters for the given authentication scenario.

Abstract: There is provided a method comprising, receiving, from a second network node, a request to access data of a user of a user device, forwarding the request to the user device, receiving, from the user device, an acknowledgement indicating that access to the data of the user is granted and transmitting, in response to receiving the acknowledgement, a first indication to a blockchain, the first indication indicating that access to the data of the user is granted.

Abstract: According to an example aspect of the present invention, there is provided a method comprising, transmitting information about a new file associated with a user device to a first blockchain, determining that an investigation associated with the user device has started, transmitting information to a private channel during the investigation and upon termination of the investigation, transmitting information about termination of the investigation to the first blockchain.