lowRISC/opentitan
Jun 2025 – Sep 2025
3 Months active
Languages Used
CC++BashBazelPythonRustShell
Technical Skills
C programmingC++ developmentcryptographyembedded systemsunit testingRust programming
Ellis Sarza-Nguyen
PROFILE
Ellis Sarza-nguyen
Ellis Sarza-Nguyen contributed to the lowRISC/opentitan repository by engineering robust cryptographic key management and enhancing test coverage for boot and cryptographic subsystems. Over three months, Ellis unified key handling across ROM and ownership flows, removing deprecated keys and simplifying security configurations for test, development, and production environments. Using C, Rust, and Bazel, Ellis implemented comprehensive unit tests for boot services and cryptographic drivers, focusing on edge cases like unaligned input handling. These efforts improved maintainability, reduced risk surfaces, and streamlined validation cycles, resulting in a more secure and reliable codebase with clear traceability and maintainable build system configurations.
Overall Statistics
Feature vs Bugs
100%Features
Repository Contributions
13Total
Bugs
0
Commits
13
Features
4
Lines of code
1,528
Activity Months3
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4517 peopleSame Organization
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Craig IngramMember
KayyuriMember
Scott SuarezMember
Agent2Agent (A2A) BotMember
Andreas AbelMember
Aadi KapurMember
Aadish GoelMember
Aahil MehtaMember
Work History
September 2025
4 Commits • 1 Features
Sep 1, 2025September 2025 monthly summary for lowRISC/opentitan: Delivered a unified approach to cryptographic key management by migrating to a single keyset across ROM and ownership, removing deprecated keys and rules (including fake ECDSA, SPX) and unauthorized key rules/filegroups, and aligning with the ownership keyset. This consolidation simplifies key handling, reduces risk surface, and standardizes environments across test/dev/prod. In addition, completed targeted cleanup of building rules and maintained traceability through cherry-picked commits with clear sign-offs, improving maintainability and security posture across the repository.
4 Commits • 1 Features
Sep 1, 2025September 2025 monthly summary for lowRISC/opentitan: Delivered a unified approach to cryptographic key management by migrating to a single keyset across ROM and ownership, removing deprecated keys and rules (including fake ECDSA, SPX) and unauthorized key rules/filegroups, and aligning with the ownership keyset. This consolidation simplifies key handling, reduces risk surface, and standardizes environments across test/dev/prod. In addition, completed targeted cleanup of building rules and maintained traceability through cherry-picked commits with clear sign-offs, improving maintainability and security posture across the repository.
September 2025
August 2025
7 Commits • 2 Features
Aug 1, 2025August 2025 highlights for lowRISC/openTitan: security-focused enhancements to the ROM verification path with unified key management, paired with improvements to image signing workflows and test reliability. Delivered robust ROM extension signature verification that supports ECDSA and SPX keys, introduced keysets to support fake/unauthorized/ownership scenarios, and laid groundwork for removing legacy RSA structures. Expanded tooling with an optional image-signing skip to streamline testing and CI workflows. Overall, these changes improve security posture, streamline key lifecycle management, and accelerate secure release validation.
August 2025
7 Commits • 2 Features
Aug 1, 2025August 2025 highlights for lowRISC/openTitan: security-focused enhancements to the ROM verification path with unified key management, paired with improvements to image signing workflows and test reliability. Delivered robust ROM extension signature verification that supports ECDSA and SPX keys, introduced keysets to support fake/unauthorized/ownership scenarios, and laid groundwork for removing legacy RSA structures. Expanded tooling with an optional image-signing skip to streamline testing and CI workflows. Overall, these changes improve security posture, streamline key lifecycle management, and accelerate secure release validation.
June 2025
2 Commits • 1 Features
Jun 1, 2025June 2025 monthly summary focused on expanding test coverage for boot and cryptographic subsystems in opentitan, with emphasis on robustness and QA. Delivered targeted unit tests for boot services and crypto drivers, including unaligned input handling, enabling safer future changes and faster validation.
2 Commits • 1 Features
Jun 1, 2025June 2025 monthly summary focused on expanding test coverage for boot and cryptographic subsystems in opentitan, with emphasis on robustness and QA. Delivered targeted unit tests for boot services and crypto drivers, including unaligned input handling, enabling safer future changes and faster validation.
June 2025
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Quality Metrics
Correctness93.8%
Maintainability86.2%
Architecture90.8%
Performance86.2%
AI Usage24.6%
Skills & Technologies
Programming Languages
BashBazelCC++PythonRustShell
Technical Skills
BazelC programmingC++ developmentKey ManagementRust programmingStarlarkbackend developmentbash scriptingbuild system configurationbuild systemscommand line toolscryptographydevopsembedded systemskey management
Repositories Contributed To
Overview of all repositories you've contributed to across your timeline