But is it a development in the crypto field, requiring someone super talented in crypto? From my understanding (though no deeper than what's in the Bitcoin whi

But is it a development in the crypto field, requiring someone super talented in crypto? From my understanding (though no deeper than what's in the Bitcoin whitepaper), the central new idea (and it is indeed a significant contribution to CS in general) is laying out of how to build a distributed timestamp server, and then distributed ledger from only untrusted peers by using existing technologies circa 2009 such as p2p, hashing data blocks, priv/public key for verify/sign, etc.