this post was submitted on 25 Dec 2023
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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.
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A security module or a key fob/smart card processes the key internally using its own dedicated ram and cpu without any debugging support. This way, even something will full ram and cpu access or a compromise of your machine, there is no way to export or access the key. Data is passed to the module and it returns the scrambled or unscrambled result based on the key which no body knows or has ever seen. A key locked with no way to access can’t be hacked without physically stealing the module, which is where your pin comes in to save you. The TPM is a very important part of a secure boot chain. If you want to secure other things I wouldn’t blame you for using a separate module or fob that isn’t always connected util it’s actually needed and it should only be activated with a physical button or something so you have to be present to engage with it. This adds even more security. So you could use the TPM for boot chain security and a separate fob or data privacy for example.