passwordless_sso

Single Sign-On (SSO) is an access control method that allow a user authenticate once on the service and gain access to the other resources related to authen- tication server without providing credential again. Passwords the most popular method for authentica- tion. However they have a lot of significant drawbacks and users are not good in managing them. For in- stance, users like to pick short passwords or the ones which consist of well-known words. This paper will show how passwordless authentication can be created and how to implement it with SSO. Keywords: SSO(Single Sign-On), passwordless, Key- cloack, OAuth, OpenID Connect, Identity Server, magic-link, authentication, authorization.