Explore a comprehensive presentation on Ouroboros Crypsinous, the first formally analyzed privacy-preserving proof-of-stake blockchain protocol. Delivered at the 2019 IEEE Symposium on Security & Privacy, this 18-minute talk delves into the intricacies of private ledgers in the (G)UC setting and introduces a novel coin evolution technique using SNARKs and key-private forward secure encryption. Learn about the advantages of proof-of-stake, the challenges of privacy preservation in blockchain, and how this protocol addresses adaptive security concerns. Gain insights into cryptographic concepts such as ZeroCash, adaptive security, and forward secure encryption, concluding with a summary of the protocol's significance in the field of blockchain technology.