this post was submitted on 07 Feb 2024
738 points (97.7% liked)
Technology
59436 readers
3829 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 1 year ago
MODERATORS
you are viewing a single comment's thread
view the rest of the comments
view the rest of the comments
Surely some smart key exchange algorithm could be used for that, e.g. the CPU provides a public key to the TPM and the TPM encrypts the symmetric disk key with that public key. Similar to how TLS works.
The private key would have to stored in clear text somewhere. Potentially if you had non volatile space on cpu that to store the private key, that might work. But if you’re going to do that, might as well just use an ftpm.
Just generate one anew. You don't need to use the same one each time
What do you mean by that? Generate a new private/public key pair every time you setup a new TPM? Or when you boot the system or something?
On each connection. Or boot. Whenever you need
Edit: to be clear, this would still be vulnerable to mitm attacks without a user entered password on top but at least you can't just read the secrets from the bus. E2: And having a password wouldn't be fully secure without such a scheme neither