643
you are viewing a single comment's thread
view the rest of the comments
view the rest of the comments
this post was submitted on 11 Feb 2024
643 points (97.9% liked)
Technology
60078 readers
3132 users here now
This is a most excellent place for technology news and articles.
Our Rules
- Follow the lemmy.world rules.
- Only tech related content.
- Be excellent to each another!
- Mod approved content bots can post up to 10 articles per day.
- Threads asking for personal tech support may be deleted.
- Politics threads may be removed.
- No memes allowed as posts, OK to post as comments.
- Only approved bots from the list below, to ask if your bot can be added please contact us.
- Check for duplicates before posting, duplicates may be removed
Approved Bots
founded 2 years ago
MODERATORS
I'll be talking about digital signatures which is the basis for such things. I assume basic understanding of asymmetric cryptography and hashing.
Basically, you hash the content you want to verify with a secure hashing function and encrypt the value with your private key. You can now append this encrypted value to the content or just release it alongside it.
To now verify this content they can use your public key to decrypt your signature and get the original hash value, and compare it to their own. To get that, they just need to hash the content themselves with the same function.
So by signing their videos with the white house private key and publishing their public key somewhere, you can verify the video's authenticity like that.
For a proper understanding check out DSA :)
Only RSA uses a function equivalent to encryption when producing signatures, and only when used in one specific scheme. Every other algorithm has a unique signing function.