Consider this to be my 7 Laws of Secure Protocol Design. They are not really laws because I'm not yet dead, but I have to get them down before that otherwise I'll miss out.
They continue to evolve, both their content and their number. Today, the number N is 7, which also is the magical number of Financial Cryptography. This be coincidence, not science, and expect it to change, as science once again takes to the sword and slaughters the dragons and myths of the dark ages of security.
These hypotheses are opinionated, yet they come of having read, experienced and been battered by many secure protocols, and built a few as well. After a while -- after repeated abuses at the hands of other peoples ideas -- one perceives patterns out of pain, and those patterns tend to predict things: success or failure, stalling or booming, security or smoke.
Twan van der Schoot as always gave a challenging critique.
H1 H2 H3 H4 H5 H6 H7