this post was submitted on 11 Feb 2024
643 points (97.9% liked)

Technology

59378 readers
3039 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
 

The White House wants to 'cryptographically verify' videos of Joe Biden so viewers don't mistake them for AI deepfakes::Biden's AI advisor Ben Buchanan said a method of clearly verifying White House releases is "in the works."

you are viewing a single comment's thread
view the rest of the comments
[โ€“] [email protected] 3 points 9 months ago (1 children)

SHA family and MD5 do not have keys. SHA1 and MD5 are insecure due to structural weaknesses in the algorithm.

Also, 2048 bits apply to RSA asymmetric keypairs, but SHA1 is 160 bits with similarly sized internal state and SHA256 is as the name says 256 bits.

ECC is a public key algorithm which can have 256 bit keys.

Dilithium is indeed a post quantum digital signature algorithm, which would replace ECC and RSA. But you'd use it WITH a SHA256 hash (or SHA3).

[โ€“] [email protected] 1 points 9 months ago

Good catch, and appreciate the additional info!