Whether an app like Telegram is secure or not has already been answered and it has recently been confirmed that it is not. Apps like Signal and Cryptocat have been recommended instead. But do these apps also offer a good web application?

In Telegram, there are two different types of chats: A normal one and a secret chat. One can use the web application when using the normal chat, but one cannot use it when using the secret chat. This may be due to the fact that one has to temper the wind to the shorn lamb. If the chat function is available on several devices, instant messaging can only be as secure as the least secure operating system can guarantee it. I don’t even know whether Telegram’s normal chats that are being used via the web application provide an end-to-end encryption.

So, I ask myself: Do Signal or Cryptocat or any other very good chat client in terms of privacy offer an end-to-end encryption from phone to phone, but also from phone to desktop or desktop to desktop? That is: They offer a good web application as well? A web application with end-to-end encryption and maybe even the possibility to browse through the chat history (which would be nice, but it is not a must)?

I know that using web applications can make the whole communication less secure instead of just sticking to one device with one operating system. But it is also a trade-off in my opinion. I, for example, am way faster when writing texts on a proper keyboard – and not on a mobile phone.

  • Did you look at the websites you linked? Both Signal and Cryptocat very clearly have desktop clients. Neither mention any limitations of their desktop client (actually, Cryptocat doesn't seem to mention a smartphone client at all). Or are you actually limiting your question solely to web-based clients rather than installable desktop clients?
    – Ben
    Commented Oct 8, 2018 at 19:52
  • "very good" in your description seems to be an evaluation of the encryption. I'm not sure we can provide that. Questions of the type, "what product/services offer feature X?" are also off-topic.
    – schroeder
    Commented Oct 9, 2018 at 9:15
  • I explicitly refer to web-based clients. @schroeder: If this question is off-topic, where can I put the question?
    – Nemgathos
    Commented Oct 28, 2018 at 17:32
  • While there is a software recommendations StackExchange, I'm not sure this would fit there. So, I'm not sure.
    – schroeder
    Commented Oct 28, 2018 at 20:10