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Cryptographic proof-of-work registration wall for Matrix Synapse (infosec.pub)

submitted 2 weeks ago* (last edited 2 weeks ago) by nemesis3469@lemmy.world to c/cybersecurity@sh.itjust.works

4 comments fedilink hide all child comments

Source code and details: https://git.anarchists.space/nemesis/Vigil

A privacy-friendly anti-spam system for account registration on a public Matrix Synapse homeserver. Before an account is created, the client solves an Argon2id puzzle that is intentionally slow and memory-intensive, taking approximately 30 minutes by default, though the homeserver owner can configure the duration. This makes large-scale bot registration expensive.

Synapse's own open registration gets turned off; Vigil is the only thing that can create an account, and it only does that once a client proves it solved a fresh puzzle.

Features

Privacy-friendly
A lot harder to bypass than traditional anti-spam systems
Optional CLI tool to solve cryptographic challenges for people who don't wanna use JavaScript
Small codebase

top 4 comments

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[–] glowie 1 points 2 weeks ago (1 children)

Hey nem, how’s the hack freedom group been!?

[–] nemesis3469@lemmy.world 1 points 2 weeks ago

It's kinda dead now since most active members migrated to another room, give me your MXID if you wanna join 😁

[–] WolfLink@sh.itjust.works -2 points 2 weeks ago* (last edited 2 weeks ago) (1 children)

I’m not waiting 2 minutes much less 30 minutes to create an account wtf

Maybe if it takes like 10s. That’s still slow enough to discourage mass spam bots.

[–] nemesis3469@lemmy.world 2 points 2 weeks ago

That's configurable by homeserver owner, it's just a default value