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How secure signal private messenger App is?

February 7, 2020

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With the development of Signal private messenger app, the time has come to say goodbye to less secure apps like WhatsApp, Facebook, Telegram etc. Signal is an open source messaging app that will surely replace your regular messaging app in the year 2020. Signal Messages and calls are protected by the world’s best encryption protocol i.e. Signal Protocol.

In this post we will talk about secure messaging in detail.

How Signal messages and calls are encrypted?

The Signal App uses end-to-end encryption protocol i.e. Signal Protocol. Due to which, messages and calls remain secure and encrypted on users’ device before being sent to the concerned recipient(s). Once the message reaches the intended recipient(s), it gets decrypted automatically, Signal protocol ensures that sent message gets decrypted only at the intended recipient’s end.

Signal app also does not even allow their own servers to store message decryption keys leaving users’ private information inaccessible to everyone including app developers themselves or even the third parties organizations like Government, secretive organizations etc. The only way to access Signal encrypted messages is to get physical access to the sender’s or receiver’s phone.

Signal messages and calls are encrypted using Signal protocol which is undoubtedly the most secure messaging protocol ever created. It combines the extended diffie-Hellman (X3DH) key protocol, prekeys, Double Ratchet Algorithm and uses AES-256, Curve25519 and HMAC-SHA256 as cryptographic primitives.

Signal protocol offers authentication, integrity, confidentiality, forward / backward secrecy, participant consistency, destination validation, message unlinkability, causality preservation, message / participation repudiation, and asynchronicity. It does not provide anonymity preservation and needs servers for the relaying of messages and storing of public key material.

Signal protocol has been audited by many great researchers and scholars. They have found the Signal protocol to be cryptographically sound. Matt Green, a Cryptographer at Johns Hopkins University, said ‘After reading the code, I literally discovered a line of drool running down my face. It’s really nice.’ whereas Edward Snowden, a Whistleblower and privacy advocate, said ‘Use anything by Open Whisper Systems.’

Few additional security features: Screen and notifications can be locked with a passphrase. By enabling incognito keyboard option, users can request keyboard to disable personalized learning. There is also a message disappearing option to delete Signal messages automatically. Message disappearing duration can be personalized by users.

Signal also let users to verify the identity of their contacts. Each Signal conversation comes with a unique safety number (fingerprint) which can be compared and verified with participant on the other end.

By enabling Screen Security option in Signal App, screen grabs can be blocked in the recent list and within the app. Along with this, users can also enable ‘Always relay calls’ security feature in order to relay all calls through the Signal server without revealing their IP address to their contact. However, enabling this option will reduce call quality.

Signal protocol used by Other apps: When it comes to secure end-to-end encryption, no encryption protocol out there can compete with Signal protocol. Due to its reputation for secure end-to-end encryption, now it is used by several high profile messaging apps such as WhatsApp, Skype and Facebook Messenger.

Using Signal protocol by other messaging apps is a major win due to which billions of ordinary users can now have secure end-to-end encrypted messaging. However, in spite of using Signal protocol, these other messaging apps are not as private or secure as Signal App as they use means to collect user data to make a profit, moreover these other apps are not open source and run by profitable companies who exploit their users data to make profit and target ads.

Signal App has revolutionized private messaging by developing open source encrypted messaging which is as easy to use as sending regular text messages or making a normal phone call. If you are looking for secure private messaging & calling application in year 2020 then download Signal Private Messenger App Today.

Don’t wait anymore – download Signal App Now!


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