A method includes a server computer receiving a request from a user to obtain a resource in a transaction using a cryptocurrency. The server computer determines that the transaction is to be made using the cryptocurrency. The server computer initiates an authentication request message to an access control server via a directory server. The access control server authenticates the user and generates an authentication indicator. The server computer receives an authentication response comprising the authentication indicator from the access control server. The server computer evaluates the authentication indicator. Responsive to evaluating the authentication indicator, the server computer can process the transaction using the cryptocurrency.