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Inside Secure Secure Boot

The Inside Secure Secure Boot solution provides tools for integrating security into an embedded device’s system boot sequence. The Inside Secure Secure Boot solution uses strong cryptography to protect the boot process of SoCs and Application Processors.

Supports multiple flexible
bootstrap stages

Support of third-party signing 
through certificates

Support for hardware acceleration, key storage and anti-rollback

How the Inside Secure Secure Boot works

The Inside Secure Secure Boot solution protects the device boot sequence by providing the following security layers: 

Integrity + Authenticity:

This layer ensures that the system only boots images that are from a trusted source, without any changes introduced to the images. Thus, this layer protects against tampering. 

Confidentiality + Anti-Cloning:

This layer protects images from being examined by encrypting the image using strong cryptography. By using product-line specific encryption keys, the protected images are also prevented from being used on other product lines. 


This layer enforces a secure firmware update by protecting against installing of images that are revoked. It prevents a hacker to use an old image with known vulnerabilities, which have been fixed in maintenance updates.Secure

The Inside Secure Secure Boot Information

Technical Specifications

The Inside Secure Secure Boot includes 2 components:

  • Secure Boot ROM code libraries to embed in the boot loader(s)
  • The Secure Boot Image Generation Tool to sign and encrypt the images

The Inside Secure Secure Boot implements strong cryptography:

  • Hash algorithms: SHA-244/SHA-256
  • Asymmetric Crypto algorithms: ECDSA (P224 & P256)
  • Symmetric Crypto algorithms: AES (128-256)

Secure Boot in combination with hardware crypto modules

The Inside Secure Secure Boot solution is designed to work with various types of hardware or a combination thereof. The following INSIDE Secure Silicon IP cores are supported:

  • Asymmetric Crypto acceleration only:
    – PKA-IP-28
    – PKA-IP-150
  • Symmetric Crypto acceleration only:
    – PacketEngine-IP-93
  • Asymmetric and Symmetric Crypto acceleration with strict Asset Protection and Rollback protection:
    – Vault-IP Platform Security Solutions

Secure Boot with certificates

The SafeZone Secure Boot solution supports use of certificates. The use of certificates allow the creator of the Secure Boot Loader (the chip manufacturer) to delegate the Secure Boot Image signing to device manufacturers. The alternative to using certificates is using multiple boot loader stages.

CryptoManager Root of Trust Cover

The CryptoManager Root of Trust

Built around a custom RISC-V CPU, the Rambus CryptoManager Root of Trust (CMRT) is at the forefront of a new category of programmable hardware-based security cores. Siloed from the primary processor, it is designed to securely run sensitive code, processes and algorithms. More specifically, the CMRT provides the primary processor with a full suite of security services, such as secure boot and runtime integrity, remote attestation and broad crypto acceleration for symmetric and asymmetric algorithms.

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