Yes, it is. It's linked directly from the paper (https://www.whatsapp.com/security/WhatsApp-Security-Whitepaper.pdf https://www.whatsapp.com/security/WhatsApp-

Yes, it is. It's linked directly from the paper (https://www.whatsapp.com/security/WhatsApp-Security-Whitepaper.pdf https://www.whatsapp.com/security/WhatsApp-Security-Whitepap...) that documents their use of the protocol. It's the exact same code we use in Signal: https://github.com/whispersystems/libsignal-protocol-java https://github.com/whispersystems/libsignal-protocol-java