Ha, I was like "REALLY!?!?" before actually clicking the link. I was thinking of: https://en.wikipedia.org/wiki/Shibboleth_Single_Sign-on_architecture https://e

Ha, I was like "REALLY!?!?" before actually clicking the link. I was thinking of: https://en.wikipedia.org/wiki/Shibboleth_Single_Sign-on_architecture https://en.wikipedia.org/wiki/Shibboleth_Single_Sign-on_arch... ...which is an unlikely contender for oldest protocol!