Signal: application that allows you to make encrypted and free calls

Signal screenshots

Every time users of mobile devices such as smartphones are more concerned about the security and confidentiality of their data that could reach the hands of spy agencies. The developers of Whisper Systems have created an open source application called Signal, which will allow us to perform encrypted calls for increased security and privacy. The company already had applications for Android such as RedPhone and TextSecure that encrypted calls and SMS respectively, now they come to iOS with Signal, which tries to merge both applications into a more simplified one.

The best thing about Signal is its ease of configuration, we just have to introduce our phone number and we will receive a text message with a code for verification. From then on we will have the list of contacts that use the application and also the contacts that have Android and the RedPhone application. Being an application of open source any developer can study it and verify the security it promises. Its operation is very simple, it has a multitude of servers throughout the world, which redirect calls to the recipient. When passing through the company's servers they do not leave a trace in any other, for external purposes they will only appear as calls we make to the Signal server.

More call or text message encryption applications have already appeared, but these are usually paid and do not have such a simplified use for the user. That is the strong point of Signal, it is totally free and can be downloaded from the App Store. Although it is still a version that may contain an error, its developers are working on improving it and soon integrating support for messaging. We attach the link direct discharge under these lines.

Have you used Signal? What do you think of the application?

The application is no longer available in the App Store

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  1.   Adal said

    Alex, excellent post ...

    It would be good if in the header you add the full name to the App by that of «Signal- Private Messager»; since in the appStore there are dozens of applications called signal and so there is no confusion.

    1.    The_YIyi said

      Adal is right

      I got a lot of App that start with Signal ... but this one in the post is "Signal- Private Messenger"

      Good bridge Adal

  2.   Andres_RacaVaca said

    The same happened to me…. it is «Signal- Private Messenger»…. they must look for it with everything and a script….

  3.   Javier said

    It does not work for me, I do not receive the SMS with the code or the verification call.

  4.   CARRIZOSA said

    Okay, but since privacy is being sought, a registry could have been implemented with usernames and not phone numbers.

    To make encrypted calls there are services such as that allow you to do the same and you can use any softphone that supports SRTP protocol, for outgoing it is ZRTP and normally paid on iPhone. (Free on Android with CsipSimple pe)

  5.   Foxi said

    Starting from that yes: As they have already said: It is not valid only with Signal (look for “Signal- Private Messager”).
    It has been curious to me that he has not let me verify it with a Wi-Fi connection… By deactivating the Wi-Fi (only with my poor 3G connection) I have been able to verify the phone's configuration (this does subtract points).

  6.   Doubtful said

    You can make calls to any phone number using the minutes of your rate ,? If so, is there a company restriction? Or can it only be from Signal User to Signal User? Do you need wifi internet, 3G, coverage or what? What did not say anything about this and is the important thing (at least for me, hahahahahaha)

  7.   Doubtful said

    Voucher. I'm silly. I hadn't read it. It is only from signal to signal users. Come on, like WhatsApp. By tango, not all that glitters is gold. 💩💩💩 (personal opinion, of course)