- Written by Scarlett Gourley
- Posted on April 20, 2021
- Updated on November 20, 2023
- 12379 Views
This feature supports to upgrade Aboot firmware via an Aboot Update File (AUF). The aim is to be able to provide a signed
- Written by Can Sun
- Posted on June 19, 2025
- Updated on July 30, 2025
- 514 Views
Measured boot is an anti-tamper mechanism. It calculates the cryptographic signatures for software system components and extends the signatures into the Trusted Platform Module (TPM) security chip. Upon startup, with the feature turned on, the Aboot bootloader and EOS calculate the hash of various system components and extend the hashes into the Platform Configuration Registers (PCRs), which is one of the resources of the Trusted Platform Module (TPM) security chip. The calculation and extension event is called the measured boot event, which is associated with a revision number to help the user identify changes to the event.
- Written by Baptiste Covolato
- Posted on June 17, 2019
- Updated on June 27, 2025
- 11500 Views
Secure boot is a security feature available in Aboot (Arista bootloader) that verifies the cryptographic signature of the EOS SWI (software image) before it is booted. Aboot embeds certificates that allow it to recognize and validate official EOS releases from Arista. If the signature verification is successful, the secure boot check passes and Aboot proceeds to boot the SWI. If the signature verification fails, the boot is aborted.