MobileCoin transactions will synchronize to the coin’s network using the Stellar Consensus Protocol for scalability and speed. The end product will emphasize user privacy and integration into mobile messaging apps, including WhatsApp and Signal — two apps that use Marlinspike’s end-to-end encrypted Signal Protocol. “MobileCoin is designed so that a mobile messaging application like WhatsApp, Facebook Messenger, or Signal could integrate with a MobileCoin wallet,” the team described in its whitepaper.

https://techcrunch.com/2018/04/24/mobilecoin-moxie-marlinspike-binance-labs/