In 2001, Zooko Wilcox-O'Hearn conjectured that a key value system, in the way the keys address those values, must make a compromise between three properties. Those properties are:

Since WhatsApp announced its acquisition, a lot of people started to switch to alternatives, trying to escape from Facebook. Some of them then discovered my article about Telegram, and a common answer was "hey, at least, it is better than WhatsApp, because it is open source, faster and it has encryption".

Following the previous article, people have asked me what I would consider as a good secure system, and others asked me to review their app, so I think it will be interesting to expose my process when studying those projects.

Here is the second entry in our serie about weird encryption apps, about Telegram, which got some press recently.