Abstract: According to an example aspect of the present invention, there is provided an apparatus comprising a memory configured to store a user key, a token relating to a resource, the token comprising the user key in encrypted form, and management data received in the apparatus from a server, and at least one processing core configured to participate in an access interaction with the resource, the access interaction being based at least partly on the token and the user key and the access interaction comprising first sending the management data to the resource and then completing the access interaction to access the resource.

Abstract: According to an example aspect of the present invention, there is provided an apparatus comprising: a memory configured to store a user key specific to a particular user or token; software code; a token relating to a second apparatus, the token comprising the user key and the software code, and at least one processing core configured to: participate in an interaction with the second apparatus, the interaction being based at least partly on the token and the user key and the interaction comprising transmitting the token to the second apparatus.