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Everything is key based, so only key holders push to your repo. It's all based on the SSB protocol.

I'd suggest reading https://github.com/noffle/git-ssb-intro to get an idea.

That states: "git-ssb's permissionless model has an interesting consequence: anybody can push to anybody else's git repository." The guide doesn't show any key-sharing in order to do that. Are you saying that's incorrect?

I don't want to give you the wrong answer so I've forward this question to the SSBC network for one of the core developers to answer better.

I'd be surprised if there was no security for pushes. The repos I've worked on did require an invite from the creator.

Marak It sounds like you are working with private repos. With git-ssb currently a repo is either public or private. Private repos are encrypted to a fixed set of recipients so only those keyholders can access it. Public repos are unencrypted.

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