Signal is a secure, open source messenger application that uses end-to-end encryption to securely send and receive all kinds of communications with other users registered on Signal. Using the Internet for all encrypted communication Signal uses registered cellular numbers as identifiers and it is highly recommended by some of the top privacy and security technologist. The application includes mechanisms by which users can easily verify the identity of their contacts and the reliability of the data channel. The non-profit Signal Foundation which manage and support the Messenger was launched in Feb, 2018. Signal saw about one million downloads world-wide in May 2020, according to analytics firm App Annie.
WhatsApp Vs Signal
Features available in Signal messenger
Disappearing messages – however this feature is yet to be tested, the feature provides capabilities for message to get deleted after specified time.
View-once media messages – memory friendly feature
Screen Security feature restrict other mobile application from screen recording or screenshot.
Incognito keyboard switch for Android users – which restrict android to send your message history to Google drive.
Signal also has wide range of clients like Linux desktop client.
Signal is open source hence user can be aware of what is going inside the code base and what is coming out, more transparent then WhatsApp
As it is open source you can also have your own chat server which make Signal a good choice for business communications.
Where is your Signal data stored?
When an user use Signal, his/her data would get stored in encrypted form on your device only . The only information that is stored on the centralized Signal servers for each account is the phone number a user registered with, the date and time he/she joined the service, and the date he/she last logged on.
As per Signal official statement “Notably, things we don’t have stored include anything about a user’s contacts (such as the contacts themselves, a hash of the contacts, any other derivative contact information), anything about a user’s groups (such as how many groups a user is in, which groups a user is in, the membership lists of a user’s groups), or any records of who a user has been communicating with. All message contents are end-to-end encrypted, so we don’t have that information either”.
Elon Musk love for Signal
Recently Elon Musk recommended Signal over WhatsApp, in one of the recent tweet he ask followers to use Signal.
Use Signal— Elon Musk (@elonmusk) January 7, 2021