I posted about the Signal messaging application versus Telegram a while ago, and I received a lot of answers about different applications as alternatives. So I'd like to write a thread giving an overview about my perspective on the security of different applications. 1/53

It's very important to remember that this thread is only about messaging applications for mobile phones, and the evaluations are based on my own perspectives and needs. In some cases they will be subjective, and you should investigate before applying the advice to yourself. 2/53

As I've mentioned in previous, when talking about secure messaging applications, it's extremely important to remember that if an application is secure enough, the limitation will not be the security of the application itself, the limitation is the security of the device. 3/53

When talking about security, the weakest link in a chain will be the one an attacker will go after. There are some applications in this thread that are very secure and have great protocols. But if the device is compromised, that will simply not matter. 4/53

So, if you have something very sensitive to discuss, my strong advice is to not trust that information to a mobile device - there are simply too many ways it could be compromised. So, from that perspective, the security of the protocol is not relevant. 5/53