Abstract: A method and system for providing proof of personal information includes a first device sending a request to a server for proving user information and data identifying a requester. The server generates (i) requester authentication data and associated data identifying a transaction, and (ii) a proof of user information using the user information and the requester authentication data. The server then sends the proof of user information and the associated data identifying the transaction to the first device. A second device sends to the server a request for getting authentication data associated with data identifying a transaction and the associated data identifying the transaction. In response to the request, the server sends authentication data associated with the data identifying the transaction to the second device. The second device or a verifier may then authenticate the user information only if the received authentication data matches the requester authentication data.

Abstract: A requester device sends to a server a request for proving a piece of user information and data identifying a requester. The server generates requester authentication data and associated data identifying a transaction. The server generates a proof of user information using the piece of user information and the requester authentication data. The server sends to the requester device, as a request response, the proof of user information and the associated data identifying the transaction. A verifier device sends to the server a request for getting authentication data associated with data identifying a transaction and the associated data identifying the transaction. The server sends to the verifier device, as a request response, authentication data associated with the data identifying the transaction. The verifier device or a verifier authenticates the piece of user information only if the received authentication data matches the requester authentication data.