Cryptography is a bit scary, especially when we've always delegated everything to HTTPS and web frameworks to manage this aspect of security. But that's a shame, with a pinch of extra encryption, many massive thefts of personal data could be avoided; and in the age of GDPR, why deprive yourself! In this presentation, we'll take a look at a few important concepts: symmetric and asymmetric encryption, signatures, key guardians... Then we'll see how to combine these concepts to create a great tool: Flightbox, an "Encryption-Based Access Control" (or EBAC) algorithm. And finally, we'll look at some of the reasons for and ways of using this, via the reference implementation of Flightbox, which is of course in Python! This presentation is aimed at both novices and experienced developers/cryptoanalysts.