Cryptography, Security Modelling, Privacy, and Confidentiality in Hyperledger

Achieving strong privacy and confidentiality on a blockchain can be a difficult thing to get right. In fact, it can even be difficult to map real-world privacy and confidentiality requirements into fu …

Achieving strong privacy and confidentiality on a blockchain can be a difficult thing to get right. In fact, it can even be difficult to map real-world privacy and confidentiality requirements into functional blockchain requirements. In this talk we discuss various aspects of cryptography, security modelling, and the techniques involved in different Hyperledger projects–including things like threshold signatures, SNARKs, security games, universally composable cryptography, the shared crypto-lib, Sawtooth’s private data objects, and Fabric’s channels–that enable us to build blockchains that have various privacy and confidentiality properties. We will give an overview of what it means to be a “secure” blockchain with regards to privacy and confidentiality and explain the best practices towards achieving this.