Signal Messenger

Signal Messenger FREE

Fast, simple, secure. Privacy that fits in your pocket.

Signal Messenger

In use it acts just like your regular SMS messenger when dealing with non-Signal users, except for displaying an option to invite them to Signal. As usual, SMs messages cost whenever your mobile provider and payment plan specify.

Signal is primarily a secure and open source messaging app that replaces your Android phone or iPhone’s regular SMS app. Messages to and from other Signal users are sent over the internet and protected by very strong end-to-end encryption. Apr 9, 2018

Highlights
Open source and now fully audited for backdoors and other nasty surprises
Uses strong encryption with Perfect Forward Secrecy
Now available as an .apk file so no need for Google Play Services framework
Created by privacy legend Moxie Marlinspike
As used by NSA whistle-blower Edward Snowden

Signal messenger is widely regarded as the most secure and private way to communicate over distance yet devised. The brainchild of privacy legend Moxie Marlinspike, Signal replaces your default SMS messenger app, making it almost seamless to use.

Signal uses end-to-end encryption
All secure Signal messages are encrypted on your phone before being sent, and can only be decrypted by the intended recipient(s).

This removes the need to trust any third party to keep your data safe, and no third party can access the messages in transit. The only way for an adversary to access messages sent by Signal is if it has direct physical access to your or the recipient’s phone.

Even then, Signal includes the option to encrypt all stored messages, which make it impossible to access them unless the phone owner can somehow be coerced into revealing their passcode.

Just remember that messages sent to non-Signal users are not secure!

Signal Private Messenger: Conclusion

Signal has revolutionized private chat by introducing highly secure open source end-to-end encrypted messaging that is as easy and seamless to use as sending regular SMS text messages. Its use of real phone numbers for contact discovery does concern some, but this is heavily mitigated against.

Quite simply, if you want secure private conversations, then there is no real competition to Signal.

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