LoginTC - Simply Strong Two-Factor Authentication LoginTC is best in class. Effortless Administration. Intuitive User Experience. Cost-effective solution for all organizations.
JSON Web Token - JSON Web Tokens are an open, industry standard RFC 7519 method for representing claims securely between two parties.
Google Authenticator - Google Authenticator is a multifactor app for mobile devices.
OAuth2 - Application and Data, Application Utilities, and User Management and Authentication
Authy - Best rated Two-Factor Authentication smartphone app for consumers, simplest 2fa Rest API for developers and a strong authentication platform for the enterprise.
LDAP - LDAP is a very flexible standards-based method that can be used to store and query information about users, groups, devices and provide authentication and authorization services in a networked environment.