Contextual authorisation

A computer-implemented method comprising:

• receiving a challenge from a relying party seeking to authenticate a user;
• providing a plurality of contextual identifiers of the user to corresponding verifying parties of a set of verifying parties;
• and
• based on verification of the provided contextual identifiers by a threshold number of the corresponding verifying parties, provision of a partial response upon verification by each verifying party for combination, combination of the partial responses to obtain a response, and transmission of the response to the relying party, and receipt of the response by the relying party:
• receiving, from the relying party, authorisation of the user to access a service as an authorised user.

A non-transitory computer readable storage medium having executable instructions stored thereon, which, when executed by a processor, cause the processor to:

• transmit a request to a service provider for access to a service;
• receive a challenge from a relying party seeking to authenticate the user;
• transmit a plurality of contextual identifiers of the user, to respective verifying parties of a plurality of verifying parties;
• receive a plurality of a partial responses from the verifying parties upon verification by the verifying parties of the received contextual identifiers;
• determine that the number of received partial responses meets a threshold number of responses;
• combine the received partial responses to obtain a combined response;
• and
• transmit, to the relying party, the combined response to obtain authorisation of the user device to access the requested service.