Abstract: A method for authentication of a user towards a multi-node party includes at least two nodes. The user contacts the nodes of the multi-node party, via a user application, and each of the nodes of the multi-node party generates a nonce and returns the nonce to the user application. The user application requests authentication from an Identity Provider, based on the nonces received from the nodes of the multi-node party and on a unique identity of the user. The Identity Provider generates a message, based on the request for authentication, and provides the message to the user application. The user application provides the message in a secret form to each of the nodes of the multi-node party. The nodes of the multi-node party verify the message by means of a multi-party verifying operation, and the user is authenticated based on the multi-party verifying operation.