In this blog text I’ll briefly cover how to use fscryptctl to encrypt and decrypt directories in an embedded Linux system.
Continue reading...yocto
Yocto Hardening: File System Encryption with fscrypt
Let’s continue encryption with the second part and move on to file system encryption.
Continue reading...Yocto Hardening: Block Device Encryption with dm-crypt
Data safety is crucial in the embedded systems. The devices can store information that should be kept secret. Encryption can be used to achieve exactly that.
Continue reading...Linux Initramfs, With and Without Yocto
Let’s get started with an introduction of what an initramfs is, and then get into more technical stuff.
Continue reading...Yocto Hardening: IMA and EVM
Let’s continue measuring where we left off, move from the bootloader side to the kernel world, and try out the IMA, integrity measurement subsystem in Linux.
Continue reading...Fuzzing Remote Targets with Syzkaller
This is the promised follow-up to my earlier Syzkaller text. This time I’ll show how to make Syzkaller work on an actual hardware that is not emulated.
Continue reading...Adding Key-Based SSH Authentication to Yocto
This text is supposed to be a quick crash course on the different keys used in SSH servers, and how to generate and use them in Yocto.
Continue reading...Fuzzing Yocto Kernel Modules with Syzkaller
As a follow-up to my black-box fuzzing text, I will present a more accurate approach to fuzzing using Syzkaller and grey-box fuzzing.
Continue reading...Raspberry Pi 4, LetsTrust TPM and Yocto
Getting LetsTrust TPM module working with Yocto was fairly simple but there were a few things I learned along the way that may be worth sharing.
Continue reading...Yocto Hardening: Measured Boot
So far we have mostly been focusing on hardening the kernel and userspace, but this time we will zoom out a bit and take a look at securing the entire system.
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