This is my technical definition of End-to-End Encryption* which can also be summarised as:

“there are ends; respect them”

…but this version has the advantage of being measurable.

---

I don’t believe I’ve previously posted this as a standalone blog post; the embedded video is my test run for the presentation which I subsequently gave at IETF 111 CFRG.

[*] strictly: end-to-end secure messaging.