I guess I was lucky I got credited, by mentioning online, early
   concepts for the Warrant Canary and (what became known as) The Street
   Performer Protocol before others.

   On Mon, Jul 16, 2018, 1:36 PM Stephen D. Williams <[1]sdw@lig.net>
   wrote:

   Cool!  That's a good idea.  I may implement it and similar things
   soon.  Just for posterity, I independently invented CAPTCHA, I think a
   year before the CMU kids thought of it.  I even began filing a patent
   while at my startup in the late 1990's, but we ran out of money.  I
   should have continued, although the situation was murky.  Imagine my
   surprise a couple years later at the IJCAI AI conferences in Acapulco
   when the CMU team presented CAPTCHA at an extra presentation at the end
   of the conference.  I went on a lark because the point of the
   presentation wasn't clear until I was sitting in it.  Just one of the
   many things I've thought of / invented that I didn't capitalize on, or
   give away in a timely fashion.  Par for the course; many people will
   have similar ideas at similar points in time.
   sdw
   On 7/14/18 4:50 PM, Steven Schear wrote:

References

   1. mailto:sdw@lig.net