Linux

48363 readers

917 users here now

From Wikipedia, the free encyclopedia

Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).

Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.

Rules

Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.
No misinformation
No NSFW content
No hate speech, bigotry, etc

Related Communities

Community icon by Alpár-Etele Méder, licensed under CC BY 3.0

founded 5 years ago

MODERATORS

[email protected]

Is anyone here using their hardware TPM chips for credentials? (lemmy.world)

submitted 11 months ago by [email protected] to c/[email protected]

29 comments fedilink hide all child comments

I'm curious about the possible uses of the hardware Trusted Protection Module for automatic login or transfer encryption. I'm not really looking to solve anything or pry. I'm just curious about the use cases as I'm exploring network attached storage and to a lesser extent self hosting. I see a lot of places where public private keys are generated and wonder why I don't see people mention generating the public key from TPM where the private key is never accessible at all.

you are viewing a single comment's thread
view the rest of the comments

[–] metiulekm 10 points 11 months ago (2 children)

The bootloader is stored unencrypted on your disk. Therefore it is trivial to modify, the other person just needs to power down your PC, take the hard drive out, mount it on their own PC and modify stuff. This is the Evil Maid attack the other person talked about.

[–] [email protected] 3 points 11 months ago

Otherwise you simply have a USB boot partition.

Pretty easy to set up, can be taken out to not be modified at run time unless you want plus not being stolen with the computer itself.

I see only drawbacks with a TPM for a computer system like that. In embedded credentials, mobile applications, cold credential storage, etc... it works very well, but it doesn't solve any problem that someone tech savvy doesn't have a better solution for, in my opinion.

If you are a big enough target for an evil maid attack, you are either good enough to circumvent it better than an embedded TPM, or you are rich enough to hire someone who is.

[–] [email protected] 1 points 11 months ago (1 children)

I can't see that being a reasonable approach for them to take, tbh. One option with TPM is that your system logs in automatically to the desktop, in which case they can just turn it on and use it normally. The other is that it requires a password at some point during startup, to which they could just use a (hardware) keylogger.

[–] [email protected] 4 points 11 months ago

It only at most auto logs you into the display manager or more generally into login. Then you still need to get root access to modify anything from there. Login would still be based on user password/key/whatever.