In October 2016, the Signal protocol was reviewed by an international team of security researchers and got glowing reviews.
Reading the above, you might think you are fine since Whats App, Facebook Messenger, and Google Allo also use the Signal Protocol. Facebook Messenger and Google Allo don’t enable end-to-end encryption by default.
There are now single-parent and same-sex-parented families, extended, reconstituted or blended families, stepfamilies and grandparent families.
So this leaves us with Whats App and Signal — the only two applications to use the Signal Protocol by default for all messages sent*.
You may be asking — why not stick with Whats App then?
Telegram was the subject to a lot of controversies over its encryption protocol.
Then in 2015, a security researcher published a research paper detailing theoretical weaknesses* in MTProto and concluded that Telegram shouldn’t have tried to roll their own encryption.
Open Whisper System focuses on the development of the Signal Protocol and also maintains a messaging application called Signal.