In addition to text messages, you can also send voice messages, make phone calls (including video). The pairing is also encrypted and secure. You pair Signal Desktop with it by scanning a QR code. The primary device is always the smartphone, which has a phone number associated with it. You can run Signal on your mobile device as well as on your computer, and the two devices can be synchronised so you can start the conversation on your mobile and finish it on your computer in the Signal Desktop app. You can do this for example in the Czech Republic as I write this (april 2022). This can be done using various online services or by buying an anonymous SIM card. On the other hand, if you want to be anonymous, you need to buy an anonymous phone number. This helps the Signal network effect a lot. This is for easy contact discovery – if you want to write to someone and you have their number in your contact list, you don’t need to do anything other else – just write them a message. As of January 2022, it had over 40 million users.Įach Signal user is currently identified by a phone number. It’s been in development since 2010, but the first version of what we know as Signal came out in 2015. Let’s start with probably the most well-known and widely used secure messenger – Signal. In this part, we will look at particular messengers and compare them. In part 1, I explained why encrypted messengers are important.
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