# TLSNotary: Bridging Data from web2 to web3 Using Privacy-Preserving MPC

- Channel: [ETHTokyo](https://streameth.org/ethtokyo)
- Date: 2024-09-18
- Duration: 21:34
- Topics: cryptocurrency, privacy, web3, blockchain, developers
- Watch: https://streameth.org/watch/66ea938b5378de9b4a4961c1

## Description

TLSNotary is an open-source project that utilizes MPC-TLS (Multi-Party Computation-Transport Layer Security) to enable users to prove and share their data while preserving their privacy. The video features a presentation by Chris from the TLS Notary team discussing the project's aim to securely bring data from Web 2.0 to Web 3.0 using privacy-preserving multi-party computation (MPC). He explains that TLS Notary is part of Privacy and Scaling Explorations, a research lab funded by the Ethereum Foundation, which focuses on programmable cryptography and building proof-of-concept applications.

Chris provides an overview of Transport Layer Security (TLS), emphasizing its role in ensuring secure communication on the internet by confirming data origin and integrity but lacking portability. He illustrates this limitation with an example where Alice needs to prove her bank balance to Bob without Bob being able to trust the document's authenticity.

TLS Notary aims to solve this problem by enabling data portability without relying on trusted third parties while preserving privacy through MPC TLS technology. Chris describes use cases such as creating a Web 3.0 ride-hailing service that leverages driver ratings from an existing platform like Uber without Uber's cooperation or knowledge.

He delves into how TLS Notary works, explaining the roles of servers, provers, and verifiers in the original TLS and how TLS Notary introduces an additional verifier who participates in key exchange using MPC. This process ensures that no single party