TextSecure doesn't use OTR, it uses a construction based on the Axolotl ratchet as described here: https://github.com/trevp/axolotl/wiki https://github.com/tre

TextSecure doesn't use OTR, it uses a construction based on the Axolotl ratchet as described here: https://github.com/trevp/axolotl/wiki https://github.com/trevp/axolotl/wiki It's much much better than OTR in that: - Asynchronicity is on by default (you don't need both parties to be up and running at the same time to start a convo) - You don't need to wait for your recipient to answer before you can write something (ie you can send multiple messages one after another, directly) - Because you can do both of the above, you can easily do multiparty, something OTR struggles with. For more details: https://whispersystems.org/blog/asynchronous-security/ https://whispersystems.org/blog/asynchronous-security/ https://whispersystems.org/blog/private-groups/ https://whispersystems.org/blog/private-groups/