When comparing Signal Private Messenger vs TextSecure, the Slant community recommends Signal Private Messenger for most people. In the question“What are the best ways to transmit sensitive information over the Internet?” Signal Private Messenger is ranked 9th while TextSecure is ranked 10th. The most important reason people chose Signal Private Messenger is:
Backed by people nut about privacy, including - Edward Snowden, Whistleblower and privacy advocate - Laura Poitras, Oscar winning filmmaker and journalist - Bruce Schneier, internationally renowned security technologist - Matt Green, Cryptographer, Johns Hopkins University
Ranked in these QuestionsQuestion Ranking
Pro Truly open and secure, comes from the Open Whisper Systems Team
Backed by people nut about privacy, including
- Edward Snowden, Whistleblower and privacy advocate
- Laura Poitras, Oscar winning filmmaker and journalist
- Bruce Schneier, internationally renowned security technologist
- Matt Green, Cryptographer, Johns Hopkins University
Pro Encrypted voice calling
Unlike many other apps, signal provides not only text messaging but also live encrypted voice calling.
Pro Free as in both free beer and freedom, not as in "The customer is the product"
Pay Nothing - The development team is supported by community donations and grants. There are no advertisements, and it doesn't cost anything to use.
Pro Strong encryption
Uses Curve25519, AES-256, and HMAC-SHA256. The security of these algorithms has been tested over many years of use in hundreds of different applications. Messages sent via TextSecure are end-to-end encrypted, which means that they can only be read by your intended recipients. We make it easy for you to verify that you are communicating with the right people and that no MITM attack has occurred. The keys that are used to encrypt your messages are stored on your device alone, and they are protected by an additional layer of encryption if you have a passphrase enabled.
Pro Passed EFF's security review
To pass EFF's security review TextSecure had to encrypt data in transit, the encryption had to be end-to-end, the app needed to provide forward secrecy, app's source code has to be open to independent review, users have to be able to verify contact's identities even with the service provider compromised, app's cryptographic design has to be well documented and app's source code has to have been audited in the last 12 months.
Pro Free and open source
TextSecure is free and open source, enabling anyone to verify its security by auditing the code. TextSecure is the only private messenger that uses open source peer-reviewed cryptographic protocols to keep your messages safe.
Con Centralized architecture
Signal's server architecture has been partially decentralized since December 2013, when it was announced that the messaging protocol that is used in Signal had successfully been integrated into the Android-based open-source operating system CyanogenMod. As of CyanogenMod 11.0, the client logic is contained in a system app called WhisperPush. According to Open Whisper Systems, "the Cyanogen team runs their own Signal messaging server for WhisperPush clients, which federates with Open Whisper Systems' Signal server, so that both clients can exchange messages with each-other seamlessly".
The WhisperPush source code is available under the GPLv3 license. In January 2016, however, the CyanogenMod team announced that they will be discontinuing WhisperPush on February 1, and recommended that its users switch to Signal. After this, Signal's server architecture will be entirely centralized.
Con Requires phone number to register
Con Code being used in Whatsapp and other parties undermines trust
It's unlikely FB would add encryption it does not have access to.
Con No data messaging
TextSecure can send SMS and MMS messages only. It can't send data messages.
Con Not available on tablets
TextSecure is currently not compatible with tablets. Support for tablets is promised in the future.