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Security

Avocado supports enterprise-grade security capabilities including hardware-backed secure boot, filesystem integrity verification, hardware-encrypted storage, and atomic updates with automatic rollback. The platform provides the foundation and tooling to implement these production-ready security features while maintaining development velocity.

Secure boot support​

Avocado enables hardware root of trust implementation with support for unbroken cryptographic chains:

  • Silicon-level bootloader validation capabilities
  • Kernel image cryptographic verification support
  • System extension validation framework
  • Application authentication mechanisms

Multi-vendor signing authority support accommodates complex supply chains while enabling end-to-end trust establishment.

Filesystem integrity capabilities​

The platform supports dm-verity implementation for real-time block-level integrity verification through Merkle tree hashing. Avocado's extension system architecture enables independent hash trees for granular validation and rollback capabilities when configured.

Hardware-Backed Encryption Support​

Avocado facilitates LUKS encryption implementation with AES-256, supporting various hardware security elements:

  • TPM key sealing capabilities
  • Secure enclave integration support
  • Hardware-unique key derivation options
  • Remote attestation framework

For systems without dedicated security hardware, the platform supports split-knowledge derivation approaches with Argon2id.

Atomic update architecture​

Avocado's dual partition A/B update architecture supports:

  • Cryptographic signature validation frameworks
  • Comprehensive integrity verification capabilities
  • Automatic rollback mechanisms
  • Differential update support for bandwidth efficiency

Production-Ready Features​

Manufacturing: Factory mode support, hardware personalization capabilities, zero-touch provisioning frameworks

Runtime: Continuous integrity monitoring support, behavioral analysis capabilities, automated response mechanisms

Compliance: Architecture supports Common Criteria, FIPS 140-2, IEC 62443, ISO 27001, GDPR, HIPAA, SOX, PCI DSS requirements with comprehensive audit trail capabilities

Avocado's security architecture enables defense-in-depth protection while preserving the development velocity and composability that defines the platform's approach to embedded Linux.