Wasn't he only just recently CSO (or similar) of Yahoo? What's the story there?
EDIT: found this: http://www.siliconbeat.com/2015/06/24/yahoo-loses-security-c...
Where it is written:
> Stamos also won plaudits this spring at Austin’s South by Southwest festival when he revealed the company will roll out end-to-end encryption for Yahoo Mail by the end of the year.
Except, I don't believe Yahoo ever did "roll out" end-to-end encryption for email?