this post was submitted on 21 May 2024
96 points (92.1% liked)

Technology

59299 readers
4531 users here now

This is a most excellent place for technology news and articles.

Our Rules

  1. Follow the lemmy.world rules.
  2. Only tech related content.
  3. Be excellent to each another!
  4. Mod approved content bots can post up to 10 articles per day.
  5. Threads asking for personal tech support may be deleted.
  6. Politics threads may be removed.
  7. No memes allowed as posts, OK to post as comments.
  8. Only approved bots from the list below, to ask if your bot can be added please contact us.
  9. Check for duplicates before posting, duplicates may be removed

Approved Bots

founded 1 year ago
MODERATORS
[email protected]
[email protected]
[email protected]
[email protected]
[email protected]
96
what if the hacker provided the public key for https connection? (www.youtube.com)
submitted 5 months ago by [email protected] to c/[email protected]
43 comments fedilink hide all child comments
 

So this video explains how https works. What I don't get is what if a hacker in the middle pretended to be the server and provided me with the box and the public key. wouldn't he be able to decrypt the message with his private key? I'm not a tech expert, but just curious and trying to learn.

you are viewing a single comment's thread
view the rest of the comments
[–] [email protected] 2 points 5 months ago (1 children)

I am personally using firefox and referencing my own servers that use their own self-signed TLS certs that I have not bothered to load onto my pc because they aren’t public, but chromium-based browsers aren’t some outlier here

[–] [email protected] 1 points 5 months ago (1 children)

Your own servers probably also dont have HSTS enabled, or clicking continue will be disabled (if not overwritten in your browser-config)

[–] [email protected] 1 points 5 months ago (2 children)

Reading the HSTS spec, it doesn’t work on first connection, and while most people are using websites they access more than once, that notably isn’t all web use.

[–] [email protected] 1 points 5 months ago

It would be inherently impossible for HSTS to work on first connection, you are correct.

[–] [email protected] 1 points 5 months ago

Indeed, not classically, but there are HSTS preload lists you can put your domain into which will be downloaded by supported browsers.
And via HSTS you can include all your subdomains, which would then force proper TLS connections for those you havent visited before too.

With the new TLS1.3 version we are getting the HTTPS / "SVCB" Record which not only allows ECH but also indicates to the client similar protection policies like HSTS. (RFC 9460)
ECH will then make such attacks impossible on TLS-level, assuming DNSSEC is used and client can make an integrity-checked lookup e.g. via DoH/DoT or validating DnsSec themselves.
The strength of this depends on the security-chain you want to follow of course. You dont need DNSSEC, but then the only integrity-check is between DNS-Service and Client if they use DoH/DoT (which is usually enough to defeat local attackers)