@Laurent: What is wrong with Signal? For example that the Signal requires tons of access rights when being installed on the phone including your phone number, email, etc. (so far from anonymous). Signal can't be installed on anything else than smartphone - i.e. no way to install it on tablet. Last but not least it's American company. Given the current legislative, you have to believe/hope, that Signal is secure. Yes, it's open source, but current hack of WhatsApp, which is using the Signal protocol, shows that it's not 100% secure. If the Signal is forced to cooperate with secret services, they can never tell you without breaking the law. They could only close as Lavabit did.
@Laurent: What is wrong with Signal? For example that the Signal requires tons of access rights when being installed on the phone including your phone number, email, etc. (so far from anonymous). Signal can't be installed on anything else than smartphone - i.e. no way to install it on tablet. Last but not least it's American company. Given the current legislative, you have to believe/hope, that Signal is secure. Yes, it's open source, but current hack of WhatsApp, which is using the Signal protocol, shows that it's not 100% secure. If the Signal is forced to cooperate with secret services, they can never tell you without breaking the law. They could only close as Lavabit did.