There are very few DEVs in the world capable to develop complete privacy protocol using trustless & non-proprietary Hardware/SW setup.
Two are:
1] Nicolas van Saberhagen of CryptoNote.
2] Anon of $DERO Homomorphic Encryption Blockchain Protocol.
Pls tag if any more such DEVs.
世界上很少有 DEV 能够使用去信任开发完整的隐私协议