Privacy

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A System for Handling 1 Compromised Key (lemm.ee)

submitted 2 months ago* (last edited 2 months ago) by [email protected] to c/[email protected]

10 comments fedilink hide all child comments

I'm asking for existing tools/systems that let me programmatically say: "here is my public key, BUT if each of these 5 other public keys all send a signed message saying that my public key has been compromised, then you should mark my public key as compromised, and use the new one they provide". (This is not for a particular task, I'm just curious if any existing auth systems are capable of this)

I call the idea "guardian keys" because it could be friends' public keys or or just more-securely-stored less-frequently-used keys that you control.

NOTE: I know this would not work for data encryption. Encrypted data is simply gone if a key is lost. But, for proving an identity, like a login, there could be a system like this but I don't know of any

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[–] [email protected] 0 points 2 months ago (2 children)

Your public key is public. It's in the name. There's no way it can be compromised, because it's meant to be disseminated publicly.

Am I missing something?

[–] [email protected] 2 points 2 months ago (1 children)

Yeah, sorry I incrementally edited the title before posting and accidentally made it make no sense. I meant publicly announce that a private key was compromised

[–] [email protected] 1 points 2 months ago

Got it. Well, mostly the same situation, in which you would only know if your key was compromised by finding it somewhere.

[–] [email protected] 2 points 2 months ago (2 children)

You're missing the most obvious thing the OP might have meant.

I took it to mean the case when the public-private key pair has been compromised. Systems been hacked, someone looked over his shoulder when authorising himself etc etc.

So OP is just asking what happens if someone steals my private key, and I need to tell the rest of the world my Identity cannot be verified using this key pair anymore.

[–] [email protected] 1 points 2 months ago

Nailed it

[–] [email protected] 0 points 2 months ago

Yeah, but that wasn't the post. Could have confused on what a public key was. Same question still applies though. If you know your private key was blown, you still need to manually clean up after it.