There's no whitepaper, but someone else in the thread already did an impressively speedy read through and breakdown of the crypto. https://news.ycombinator.com/

There's no whitepaper, but someone else in the thread already did an impressively speedy read through and breakdown of the crypto. https://news.ycombinator.com/item?id=25351388 https://news.ycombinator.com/item?id=25351388 In short, there's no custom cryptography in the service. The core crypto is all performed by libsodium.