Fast Two-Factor Authentication Method in Systems With a Centralized User's Database

work proposes a two-factor authentication method by integrating the second factor into the authentication service in system with a centralized user's database. This approach made it possible to achieve the universality of the process and reduce the authentication time. In this case, the compromise of the first factor becomes inexpedient. Simulation showed that the rest of the authentication parameters meet the requirements defined by international standards for two-factor authentication procedures.