Alex Smolen


Clever Badges

Clever Badges is an authentication system targeted at K-2 students. I wrote a blog post about the security of Clever Badges.

Alex ❤️ Hana

I lovingly built our wedding website at

Two-Factor at Twitter

I helped build two-factor at Twitter. Mat Honan wrote an article about it for Wired called "Twitter’s Killer New Two-Factor Solution Kicks SMS to the Curb".


NoPassword is an open-source rails engine demonstrating passwordless logins using email as a secret delivery mechanism. It's hosted on Github. See the HN discussion.

Agave Society

I built a community site for fans of agave spirits called

Privacy Design Analyzer

For my masters program I built a tool for analyzing privacy concerns in a system using a method analogous to threat modelling. It's hosted on Github.