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Can a PDF contain something that tracks you? If you mean in the PDF file itself, and part of the PDF standard, and which does not require the user to click on something (like a link annotation), it would just be javascript. Which means in general, especially if javascript interpretation is off, then no a PDF can't track you. Generally PDF DRM/tracking is ...


1

The way other users can identify you in the Signal-App is solely through your phonenumber. There is no other way you can connect to new contacts. Like it's said at the Signal-Website: What is my Signal Profile? Your Signal Profile is a name and avatar that you can choose to set up within the app. It will be shown alongside your existing phone number ...


1

The addresses in Signal is the phone number. It's specifically designed to use the phone number to address message, to be a drop in replacement for SMS, and offer opportunistic encryption for text messages and calls between phones. If this is not fine in your situation, then Signal is (sadly) the wrong system for you. As you say, Telegram (and many others) ...


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