Algorithm of private messages?

Question

Algorithms

Hello!
Once upon a time I saw an article on Habré, something like the "Algorithm for Private Messages", now I want to find it. Searching the site did not give anything, I tried to search through Google, there is also no result.
Post a link please :)

Answer 1

in general, here is habrahabr.ru/tag/personal%20messages/
But it's better to specifically ask what you need. After all, the "Algorithm for private messages" is very simple)