Purpose

• The project focuses on the characterization and validation of the STM32 Random Number Generator (RNG) Entropy to ensure high-quality randomness.
• It aims to support compliance with the NIST SP800-90b certification standards for cryptographic security.

Work To Be Done / Tasks

• Setup a process to extract continuous random bits from the STM32 RNG and run statistical tests to evaluate randomness quality.
• Perform Entropy Source Validation (ESV) on STM32 RNG and document results and methods.
• Support NIST SP800-90b certification documentation and update existing application notes.
• Update AN4230 to include latest RNG results and methods, integrating findings into clear technical guidance.

Required Skills & Tools

• Experience with STM32 and Embedded C for accessing and extracting RNG output from microcontrollers.
• Knowledge of RNG Entropy Source Validation, embedded security, and basic cryptography concepts.
• Familiarity with Python and OpenSSL is optional but useful for statistical testing and post-processing of entropy data.

Deliverables & Expected Outcomes

• A validated process for continuous random bit extraction and a set of statistical test results demonstrating entropy quality.
• Comprehensive ESV report suitable to support NIST SP800-90b certification activities.
• An updated AN4230 document that includes the latest RNG results, methods, and recommendations for STM32 users.

Keywords

• STM32 Embedded C
• RNG Entropy Source Validation
• Embedded Security, Cryptography
• Python and OpenSSL (Optional)

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