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TextSecure was a free and open-source encrypted messaging application for Android that was first released in May It was developed by Open Whisper Systems matrix bochum single used end-to-end encryption to secure the transmission of instant messages, group messages, attachments and media messages to other TextSecure users. In NovemberTextSecure was merged with an encrypted voice calling application called RedPhone and was renamed as Signal. TextSecure was the first application to use the Signal Protocolwhich has since been implemented into WhatsApp and other applications.
TextSecure started as an application for sending and receiving encrypted SMS messages. In NovemberWhisper Systems announced that it had been acquired by Twitter. The financial terms of the deal were not disclosed by either company.
Marlinspike could help the then-startup improve its security", matrix bochum single. Twitter released TextSecure as free and open-source software matrix bochum single the GPLv3 license in December Open Whisper Systems' website was launched in January In FebruaryOpen Whisper Systems introduced the second version of their TextSecure Protocol now Signal Protocolwhich added group chat and push messaging capabilities to TextSecure.
The developers said matrix bochum single their next matrix bochum single would be to provide TextSecure instant messaging capabilities for iOS, unify the RedPhone and TextSecure applications on Android, matrix bochum single, and launch a web client, matrix bochum single. TextSecure compatibility was added to the iOS application in March From version 2.
Reasons for this included: [7]. In Novemberthe RedPhone application was merged into TextSecure and it was renamed as Signal for Android. TextSecure allowed users to send encrypted text messages, audio messages, matrix bochum single, photos, videos, contact information, and a wide selection of emoticons over a data connection e.
Wi-Fi3G or 4G to other TextSecure users with smartphones running Android. TextSecure also allowed users to exchange unencrypted SMS and MMS messages with people who did not have TextSecure. Messages sent with TextSecure to other TextSecure users were automatically end-to-end encrypted, which meant that they could only be read by the intended recipients. The keys that were used to encrypt the user's messages were stored on the device alone.
In the user interface, encrypted messages were denoted by a lock icon. TextSecure allowed the user to set a passphrase that encrypted the local message database and the user's encryption keys, matrix bochum single. TextSecure had a built-in function for verifying that the user was communicating with the right person and that no man-in-the-middle attack had occurred.
This verification could be done by matrix bochum single key matrix bochum single in the form of QR codes in person. TextSecure allowed users to chat with more than one person at a time. The servers did not have access to group metadata such as lists of group members, matrix bochum single, the group title, matrix bochum single, or the group avatar icon. The application could also function matrix bochum single a drop-in replacement for Android's native messaging application as it could fall back to sending unencrypted SMS and MMS messages.
TextSecure required that the user had a phone number for verification. A number could only be registered to one device at a time. The official TextSecure client required Google Play Services because the app was dependent on Google's GCM push messaging framework.
From March forward, TextSecure's message delivery was done by Open Whisper Systems themselves and the client relied on GCM only for a wakeup event.
TextSecure was the first application to use the Signal Protocol then called the TextSecure Protocolwhich has since been implemented into WhatsAppFacebook Messengerand Google Alloencrypting the conversations of "more than a billion people worldwide".
The protocol provides confidentiality, integrity, authentication, participant consistency, destination validation, forward secrecybackward secrecy aka future secrecycausality preservation, message unlinkability, message repudiation, participation repudiation, and asynchronicity. The group chat protocol is a combination of a pairwise double ratchet and multicast encryption. All client-server communications were protected by TLS. In order to determine which contacts were also TextSecure users, cryptographic hashes of the user's contact numbers were periodically transmitted to the server.
The group messaging mechanism was designed so that the servers did not have access to the membership list, group title, matrix bochum single, or group icon. The server architecture was partially decentralized between December and February In Decemberit was announced that the messaging protocol that was used by TextSecure had successfully been integrated into the Android-based open-source operating system CyanogenMod. According to Open Whisper Systems, the Cyanogen team ran their own TextSecure server for WhisperPush clients, which federated with Open Whisper Systems' TextSecure server, so that both clients could exchange messages with each-other seamlessly.
The complete source code of TextSecure was available on GitHub under a free software license. TextSecure was officially distributed only through Google Play. In OctoberTextSecure had been installed over 1 times through Google Play. TextSecure was briefly included in the F-Droid software repository inbut was removed at the developer's request because it was an matrix bochum single build and exceptionally out of date.
Open Whisper Systems have subsequently said that they will not support their applications being distributed through F-Droid because it does not provide timely software updates, relies on a centralized trust model and necessitates allowing the installation of apps from unknown sources which harms Android's security for average users. In OctoberiSEC Partners published a blog post in which they said that they had audited several of the projects supported by the Open Technology Fund over the past year, including TextSecure.
In Octoberresearchers from Ruhr University Bochum published an analysis of the TextSecure encryption protocol. Former NSA contractor Edward Snowden endorsed TextSecure on multiple occasions. In his keynote speech at SXSW in Marchhe praised TextSecure for its ease-of-use.
In Octoberthe Electronic Frontier Foundation EFF included TextSecure in their updated Surveillance Self-Defense guide. TextSecure was developed by a nonprofit software group called Open Whisper Systems. As of October [update] matrix bochum single, the project has received an unknown amount of donations from individual sponsors via the Freedom of the Press Foundation.
government funded program that has also supported other privacy projects like the anonymity software Tor and the encrypted instant messaging app Cryptocat. From Wikipedia, the free encyclopedia. Free encrypted messaging app. This article is about a discontinued Android application, matrix bochum single.
For its successor, see Signal software. TextSecure's icon from May to February and from February to February Main article: Signal Protocol. Main article: Open Whisper Systems. Freedom of speech portal Free and open-source software portal Telecommunications portal, matrix bochum single.
Archived from the original on 21 January Retrieved 28 February Google Play, matrix bochum single. Archived from the original on 19 October Retrieved 19 October Retrieved 15 March Retrieved 26 February Retrieved 2 March Open Whisper Systems.
Retrieved 2 November Retrieved matrix bochum single March Retrieved Bloomberg Businessweek. The Wall Street Journal. Retrieved 10 July The Twitter Developer Blog. Archived from the matrix bochum single on 24 October Retrieved 22 January Whisper Systems.
Archived from the original on 6 January Archived from the original on 31 July Retrieved 18 January Retrieved 23 January The Intercept. encrypted messages between Android, iOS". Ars Technica. GitHub pull request. Retrieved 27 September Heise in German, matrix bochum single. Retrieved 29 July Der Standard in German. Retrieved 1 August Archived from the original on 14 March Retrieved 14 March Archived from the original on 6 September Retrieved 2 January Archived from the original on 5 Matrix bochum single
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