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What is BlueSky authenticated Transfer Protocol (ADX)?

Bluesky was created to build a social protocol. In the spring, we released “ADX,” the very first iteration of the protocol. Over the summer we improved and simplified ADX’s design, and today we’re sharing a preview of what’s to come. ADX is now the “Authenticated Transfer Protocol” — or, more simply, the “AT Protocol.”

What is authenticated Transport (AT) protocol?

Called authenticated transport (AT) protocol, this is the technology upon which Bluesky is built. While Bluesky is the first major release on AT protocol, the technology is open and available for use by any user, developer, or company (in much the same way anyone can build on a public blockchain like Ethereum).

What is Twitter authenticated data experiment (ADX)?

Adi has covered video games, biohacking, and more for The Verge since 2011. Bluesky, Twitter’s open-source offshoot, has released early code for a decentralized social network protocol. The system is dubbed the Authenticated Data Experiment (or ADX) and is available on GitHub for developers to test, although Bluesky emphasizes that it’s incomplete.

Will BlueSky's adX be a semi-public project?

It’s one of the most substantive windows into Bluesky’s workings since the project was conceived in 2019 and formally incorporated in early 2022. Bluesky CEO Jay Graber writes that ADX will be the start of a semi-public development process.

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