The new Arm Cortex-M33 micro-controllers include the Arm TrustZone, which provides a root of trust to the software and enables the use of a Trusted Firmware. The Arm TrustZone and Trusted Firmware technologies facilitate the implementation of a Secure Boot and Secure Firmware Update thanks to the separation of the secure and non-secure zones. Let’s dig into what kind of security management with Trusted Firmware and Arm TrustZone can be achieved.

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Formats of security certificates

While I was integrating wolfSSL in a project, I had to study its possibilities to import or export keys and certificates. I came across different formats of security certificates which were unfamiliar. I thought that it would be interesting to share what I learned.

wolfSSL is a lightweight SSL/TLS library targeted at, among others, embedded environments. It provides APIs for several ciphers that allow a strong and secure end-to-end encryption and can exploit the cryptographic hardware units of some SoC.

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