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Server supporting the Signal Private Messenger applications on Android
...Although cryptographic operations and message confidentiality are managed by the client side using the Signal Protocol, the server ensures message routing, user registration, and group updates without having access to the decrypted contents. Its codebase is public to ensure transparency and auditability for a security-focused community willing to inspect how message metadata and delivery mechanisms are implemented.
An Instant Messaging App which utilizes the newly released facebook.com developer API (developers.facebook.com) to merge Instant Messaging with the facebook.com community experience.