OpenID authentication is one of the authentication types supported by 1C:Enterprise authentication mechanism. In this case, authentication is performed by an external OpenID provider.
OpenID authentication offers an advantage over 1C:Enterprise authentication for users that work with a large number of infobases. With 1C:Enterprise authentication, users provide their name and password every time they connect to an infobase. With OpenID authentication, they only provide the name and password once, during the first connection to the infobase. Then the OpenID provider remembers the user and authenticates then automatically.