A quick technical review 🧵 on AT Protocol (Bluesky) and Farcaster.

Both protocols have quite similar objectives, but they have very different design.

First, identity. Both want account portability where user can migrate identity to a new service provider without existing server’s cooperation (unlike Fediverse). 

The social internet is made of cats | Director @ Internet Society Hong Kong | Ex-Apple Sr. Engineer | 🇭🇰🇹🇼 | kcchu_.twitter

In ATP, the small-world (i.e. PDS) is user-owned and hence it offers censorship resilience similar to the web. The big-world is provided by larger service providers and it is inevitable that censorship (or moderation) happens in this layer. 12/n