Meaning
Information security practices govern the protection and storage of the private cryptographic keys used to sign and authenticate hardware firmware. Maintaining secure boot key custody prevents unauthorized parties from generating code that the device will accept as legitimate. This protection is the foundation of the trust chain that ensures only verified software runs on a connected device.
Storage Environment
Hardware security modules or air gapped computers are used to keep the keys away from the reach of network based attacks. Under secure boot key custody, access to the physical storage location is restricted to a small number of authorized personnel. This isolation reduces the risk of key theft or accidental exposure.
Access Protocol
Multiple layers of approval are required before a key can be used to sign a new firmware release. Secure boot key custody includes a logging system that records every time a key is accessed and for what purpose. This audit trail is necessary for meeting the security standards of regulated industries.
Chain Integrity
Revocation lists and key rotation schedules ensure that the system remains secure even if one key is compromised. If secure boot key custody is lost, the entire fleet of devices may become vulnerable to permanent hacking. Proper management of these secrets is a lifelong requirement for any secure hardware product.