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You might know that Signal is a popular messaging app that bills itself as being very secure, offering end-to-end encryption for a very high level of privacy.

It’s not necessarily obvious, though, what all that means, and how Signal’s technology affords any more protection than other messaging apps. 

How Signal’s encryption works

Signal offers end-to-end encryption, which essentially means that your messages are scrambled into an unintelligible collection of characters before leaving your device and are not decrypted back into meaningful content until reaching the Signal app on the recipient’s device. 

These encrypted messages can only be unlocked using a key that is shared between the two private conversations. No one else has access to the key or can decrypt the message – not even the developers of the Signal app.

Because there is no “back door” to decrypting Signal messages, Signal can’t decrypt messages for the government, for example, even under subpoena – not because of policy, but because it’s not technically possible.

Signal’s encryption algorithm isn’t proprietary or even unique. The encryption software used by Signal is open-source (and used by other messaging apps, including WhatsApp) and

Source:: Businessinsider – Tech


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