Creation year: 2010
Supported Platforms: Windows, Android, IOS, Linux, MacOS
Used user identifiers: mobile phone, passcode, it is possible to use Touch ID or Face ID.
Declared security: Has a reputation as the most secure among all other messengers. End-to-end encryption, the code is publicly available.
What data it collects: access to the phone number and contacts in the address book.
Advantages: “disappearing messages” function – self-destruction of messages by timer, protection from previewing messages in chat when switching applications in iOS.
What users are talking about: users of smartphones on iOS are asked to add screenshots lock, delete and edit messages.
Android users complain that message sending notifications are not displayed on the screen and on the app icon. Difficulties arise when trying to get through to the interlocutor, poor communication. Difficulties with registration (it is reported that the confirmation code has not been accepted).
Events: In October 2018, cybersecurity expert Matthew Suish revealed that Signal was migrating from a Chrome extension to a full desktop version, exporting user messages unencrypted. At the same time, not everyone considers the vulnerability to be the ability to obtain data through direct or local access to the computer, saying that this is not a technical problem.
Last month, Cellebrite, a spy software and digital intelligence company, said it was able to hack the messenger and gain access to the data it contained.
Later, researchers from the University of Würzburg, together with colleagues from the Technical University of Darmstadt, found that the messenger “leaks” the phone numbers of its users, and this allows you to extract information from their profiles – photos, nicknames and statuses, date and time of the last connection.
In January of this year, Elon Musk advised using this messenger in his twitter post. After that, against the background of the situation with WhatsApp updates, Signal downloads grew by 4200% in a week.
Disadvantages: The probability of finding the person we need in Signal is small, in Russia the messenger is not widespread.
The message cannot be edited. You cannot delete the sent message without leaving a trace – the trail “this message has been deleted” remains, it shows all the friends who use this messenger.