Qoriq Trust Architecture 21 User Guide !!top!! Direct
: Transitions the SoC into a secure "Fail-Secure" state during a breach.
The TA 21 framework relies on several tightly integrated hardware components working in unison. Understanding these pillars is essential for proper system implementation. Internal Boot ROM (IBR)
). Securely store the private keys; the public keys will be used to generate the hashes for programming. Step 2: Image Signing
Hardware-enforced memory protection and access control lists (ACLs) for peripheral isolation. qoriq trust architecture 21 user guide
Handles SHA-1, SHA-256, and SHA-512 hashing.
Control transfers to the validated primary bootloader. The bootloader then uses the CAAM API to validate subsequent software layers, such as the operating system kernel, device tree, and root filesystem, establishing an unbroken Chain of Trust. 4. Key Management and Provisioning
Unique device IDs and OEM-programmable fuses (One-Time Programmable) to bind software to specific hardware. : Transitions the SoC into a secure "Fail-Secure"
Separate the development signing process from production signing to limit employee exposure to critical production keys.
: The secure operational mode where the system executes only validated, cryptographically signed code.
To transition a device from development to a secure production state, you must program the On-Chip One-Time Programmable (OTP) register blocks. Step 1: Generate the Public Key Hash Internal Boot ROM (IBR) )
Utilize OpenSSL or NXP’s Code Signing Tool (CST) to generate RSA or ECC key pairs.
One-Time Programmable (OTP) fuses permanently store the device's root of trust. These fuses hold the SHA-256 hashes of the public root keys, security configuration flags, and the OEM secret symmetric keys used for decryption. 2. Secure Boot Flow and Chain of Trust
Alex realizes a crucial flaw in standard security: A hacker might not be able to create new malicious code, but they might be able to force the system to run old code—code from version 1.0 that had a known bug they can exploit. This is a "Rollback Attack."
