Stellar makes a bet that Keybase can port easy end-to-end encryption over to person-to-person payments in cryptocurrency. : While the idea may seem far from mainstream, it's actually at the center of a deal that finds the non-profit behind the world's eighth-largest blockchain, the Stellar Development Foundation, funding the co-founders of OKCupid and their new cryptography-centric startup, Keybase. Revealed exclusively to CoinDesk, Keybase has accepted an undisclosed investment from Stellar. But while the terms of the deal aren't known, the startup wasn't shy in boasting about the alleged size.