Abstract: Disclosed herein is a system for verifying data associated with a party requesting a product or service. The system includes a verification function, a ledger database, and a network directory with network identity data records. The verification function receives a data verification request message with an identifier and a data assert assertion of data asserted to be accurate by the requesting party. The verification function determines a network identity associated with the identifier by querying the network directory and communicates a data record request associated with the network identity to the ledger database. The ledger database identifies a verified data record associated with the network identity. The verification function determines if the verified data record matches the data assertion and communicate a message to the external computer system indicating if the data has been verified.

Abstract: System comprising an authorisation server; a client device communicably coupled to the authorisation server and configured to execute an application program; and a remote server communicably coupled to the client device for providing an application feature to the application program. The application program is configured to, in response to receiving a user request to use an application feature: access a first private key; and transmit an access request signed with the first private key to the authorisation server. The authorisation server is configured to issue a signed security token signed with a second private key to the application program in response to receiving the signed access request. The signed security token has a finite lifetime within which the application program can access the requested application feature using the signed security token. The application program is configured to access the application feature from the remote server using the signed security token.

Abstract: System comprising an authorisation server; a client device communicably coupled to the authorisation server and configured to execute an application program; and a remote server communicably coupled to the client device for providing an application feature to the application program. The application program is configured to, in response to receiving a user request to use an application feature: access a first private key; and transmit an access request signed with the first private key to the authorisation server. The authorisation server is configured to issue a signed security token signed with a second private key to the application program in response to receiving the signed access request. The signed security token has a finite lifetime within which the application program can access the requested application feature using the signed security token. The application program is configured to access the application feature from the remote server using the signed security token.