Abstract: A hybrid authentication system, a method, and a non-transitory computer-readable medium for single-sign-on authentication is provided. The hybrid authentication system is communicatively coupled to a web application server and a public ledger. The hybrid authentication system receives a request from the web application server to access secure content on a resource server and controls display of a set of user-selectable options on a user interface of a user device based on the received request. The hybrid authentication system selects at least one authentication option from the displayed set of user-selectable options and authenticates the received request based on the selected at least one authentication option. The selection of the at least one authentication option is based on a user input over the displayed set of user-selectable options.