In their relatively short lifespan, blockchain technologies have already undergone significant milestones. Bitcoin’s blockchain, often referred to as Blockchain 1.0, features a simple database ledger that records transactions in a chronological order and represents the state of the network to participants. Ethereum, or Blockchain 2.0, introduced the notion of smart contracts. Microsoft’s Bletchley Project introduces a new modular architecture which might mark a new milestone for blockchain technologies. Marley Gray, Principal Program Manager Blockchain at Microsoft, joins us to talk about Microsoft’s approach to blockchain architecture. With enterprise in mind, Bletchley introduces the concept of “Cryptlets”, the core building blocks for introducing a secure middleware tier into blockchain application infrastructure. These computational units, running off-chain, on secure trusted container enclave hardware, could provide trusted data to on-chain smart contract logic. Topics covered in this episode: Marley’s background and experience at Microsoft Why Microsoft is aggressively pursuing blockchain technologies (compared to other large tech companies like Amazon, Google, Facebook, etc) Microsoft’s Azure Blockchain-as-a-Service offering Project Bletchley, its goals and the problems it is trying to address The primary use cases in which Bletchley may provide value How Bletchley addresses the issue of deploying consortium style blockchains What are Cryptlets and how do they relate to Bletchley How Cryptlets are different from Oracles How Cryptlets could provide data to Ethereum-style smart contracts Episode links: Bletchley Whitepaper Blockchain as a Service (BaaS) | Microsoft Azure This episode is hosted by Brian Fabian Crain and Sébastien Couture. Show notes and listening options: epicenter.tv/161

Stratumn CEO Richard Caetano and Head of Research Anuj das Gupta joined us to discuss their work to bring security and integrity to processes. We covered the philosophy behind the company and why they use cryptography and other technologies coming out of the crypto space while shunning a classical blockchain design. Topics covered in this episode: How Paris-based startup Stratumn was founded Why Stratumn’s thinking revolves around processes How Proof-of-Process secures the who, what, where, when and why of each step of a process How Stratumn uses Zero Knowledge Proofs to protect privacy The connection between Proof-of-Process and blockchain protocols Why using cryptography to secure processes didn’t gain traction earlier but does so today Episode links: Stratumn Website Proof-of-Process white paper Use case book Chainscript Stratumn Blog This episode is hosted by Brian Fabian Crain and Meher Roy. Show notes and listening options: epicenter.tv/159