Open ID Connect vs OpenID 2.0 : Witness the difference

OpenID Connect request is just 2 lines!

OpenID 2.0 request is like 5-10 lines of code

Simple Identity Layer on top of OAuth 2.0
REST and JSON instead of SOAP and XML
No signatures (for lower levels of assurance
Protocol Complexity, e.g. Message Format

Authentication request in OpenID Connect 

https://accounts.login.idm.telekom.com/oauth2/auth?response_type=code&client_id=MEDIAST ORE&scope=openid+profile+phone&redirect_uri=https%3A%2F%2Fsamtestt1.toon.sul.t-online.d e%2Fmedia-store%2Flogin%2F%3Fmode%3Doic

Authentication request in OpenID 2.0 

https://accounts.login.idm.telekom.com/idmip?openid.ns=http%3A%2F%2Fspecs.openid.net%2F auth%2F2.0&openid.claimed_id=http%3A%2F%2Fspecs.openid.net%2Fauth%2F2.0%2Fidentifier_se lect&openid.identity=http%3A%2F%2Fspecs.openid.net%2Fauth%2F2.0%2Fidentifier_select&ope nid.return_to=https%3A%2F%2Ffavoriten.t-online.de%2Fdashboard%2Fverification_openid.htm l%3FproviderId%3Dcdb-de&openid.realm=https%3A%2F%2Ffavoriten.t-online.de&openid.assoc_h andle=S01995598-f734-4660-be3e-e09fb9cf4124&openid.mode=checkid_setup&openid.ns.ext2=ht tp%3A%2F%2Fidm.telekom.com%2Fopenid%2Fext%2F2.0openid.ns.ext3=http%3A%2F%2Fspecs.openid .net%2Fextensions%2Fui%2F1.0&openid.ext3.x-name=true&openid.ext3.icon=true&openid.ns.ex t4=http%3A%2F%2Fopenid.net%2Fsrv%2Fax%2F1.0&openid.ext4.mode=fetch_request&openid.ext4. type.displayname=urn%3Atelekom.com%3Adisplayname&openid.ext4.type.msisdn=urn%3Atelekom. com%3Amsisdn&openid.ext4.type.usta=urn%3Atelekom.com%3Austa&openid.ext4.required=displa yname%2Cmsisdn%2Custa
5 Dr

Thanks to Dr. Torsten Lodderstedt  of Deutsche Telekom AG  (part of openID Workshop presentation.)