F-Secure: U-Booting securely

This paper aims to provide an independent analysis of known pitfalls and production misconfigurations related to using U-Boot (officially: Das U-Boot) in secure embedded systems as well as provide developers with guidance towards securing their products. It is aimed at teams and organisations planning to use or already using U-Boot as part of their existing products. Most of the examples have been encountered by the F-Secure Consulting Hardware Security team when researching secure boot implementations and resulted in either a partial or complete compromise of device security.

https://labs.f-secure.com/publications/u-booting-securely/

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