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1) Modify SessionRecord to store a list of "previous" sessions in addition to the current active session. Previous sessions can be used for receiving messages, but not for sending messages. 2) When a possible "simultaneous initiate" is detected, push the current session onto the "previous session" stack instead of clearing it and starting over. 3) Additionally, mark the new session created on a received possible "simultaneous initiate" as stale for sending. The next outgoing message would trigger a full prekey refresh. 4) Work to do: outgoing messages on the SMS transport should probably not use the existing session if it's marked stale for sending. These messages need to fail and notify the user, similar to how we'll handle SMS fallback to push users before a prekey session is created.
TextSecure
A secure text messaging application for Android.
TextSecure is a replacement for the standard text messaging application, allowing you to send and receive text messages as normal. Additionally, TextSecure provides:
- Local Encryption -- All text messages, regardless of destination, that are sent or received with TextSecure are stored in an encrypted database on your phone.
- Wire Encryption -- When communicating with a recipient who is also using TextSecure, text messages are encrypted during transmission.
Current BitHub Payment For Commit:
Building and contributing code
Instructions on how to build TextSecure, as well as on how to setup an IDE to modify it can be found in the "BUILDING.md" file.
Bug tracker
Have a bug? Please create an issue here on GitHub!
https://github.com/WhisperSystems/TextSecure/issues
Documentation
Looking for documentation? Check out the wiki!
https://github.com/WhisperSystems/TextSecure/wiki
Mailing list
Have a question? Ask on our mailing list!
whispersystems@lists.riseup.net
https://lists.riseup.net/www/info/whispersystems
Translation
Interested in helping to translate TextSecure? Contribute here:
https://www.transifex.com/projects/p/textsecure-official/
Downloads
TextSecure can be downloaded from the Play Store here:
https://play.google.com/store/apps/details?id=org.thoughtcrime.securesms
Cryptography Notice
This distribution includes cryptographic software. The country in which you currently reside may have restrictions on the import, possession, use, and/or re-export to another country, of encryption software. BEFORE using any encryption software, please check your country's laws, regulations and policies concerning the import, possession, or use, and re-export of encryption software, to see if this is permitted. See http://www.wassenaar.org/ for more information.
The U.S. Government Department of Commerce, Bureau of Industry and Security (BIS), has classified this software as Export Commodity Control Number (ECCN) 5D002.C.1, which includes information security software using or performing cryptographic functions with asymmetric algorithms. The form and manner of this distribution makes it eligible for export under the License Exception ENC Technology Software Unrestricted (TSU) exception (see the BIS Export Administration Regulations, Section 740.13) for both object code and source code.
License
Copyright 2011 Whisper Systems Copyright 2013 Open WhisperSystems
Licensed under the GPLv3: http://www.gnu.org/licenses/gpl-3.0.html