logsem/clutch
Oct 2024 – Apr 2026
12 Months active
Languages Used
CoqDockerfileYAMLOCamlMarkdownJSON
Technical Skills
cryptographyformal verificationfunctional programmingprobabilistic reasoningFormal VerificationFunctional Programming
Philipp G. Haselwarter
PROFILE
Philipp G. Haselwarter
Over the past year, contributed to the logsem/clutch repository by building formal verification frameworks and privacy-preserving analytics for cryptographic and data processing systems. Leveraging Coq and OCaml, developed and proved security properties for cryptographic primitives, implemented differential privacy mechanisms with Laplace noise, and enhanced probabilistic reasoning through new semantics and coupling proofs. Introduced CI/CD pipelines and Docker-based environments to ensure reproducibility and ease of onboarding. Improved documentation, build systems, and developer experience, while expanding educational content and tutorials. The work emphasized maintainability, rigorous proof engineering, and reliable privacy guarantees, enabling robust, auditable, and scalable formal methods for secure computation.
Overall Statistics
Feature vs Bugs
85%Features
Repository Contributions
99Total
Bugs
5
Commits
99
Features
28
Lines of code
208,390
Activity Months12
Your Network
8 peopleShared Repositories
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ScreenLMember
Alex BaiMember
Alejandro AguirreMember
Simon GregersenMember
Hei LiMember
heiliMember
Joseph TassarottiMember
Simon GregersenMember
Work History
April 2026
6 Commits • 2 Features
Apr 1, 2026April 2026: Delivered significant enhancements to the hashing system and the differential privacy framework in logsem/clutch. Hashing enhancements introduce nonce handling, dual urns for improved randomness, and a hash checkpoint to ensure integrity and proper state management of guesses and urns. Differential Privacy (DP) framework enhancements strengthen formal privacy guarantees through dp-coupling completeness, relational DP completeness, and refactored proofs for clarity and robustness. These changes establish stronger data integrity, auditability, and privacy protections while preserving system reliability and maintainability.
6 Commits • 2 Features
Apr 1, 2026April 2026: Delivered significant enhancements to the hashing system and the differential privacy framework in logsem/clutch. Hashing enhancements introduce nonce handling, dual urns for improved randomness, and a hash checkpoint to ensure integrity and proper state management of guesses and urns. Differential Privacy (DP) framework enhancements strengthen formal privacy guarantees through dp-coupling completeness, relational DP completeness, and refactored proofs for clarity and robustness. These changes establish stronger data integrity, auditability, and privacy protections while preserving system reliability and maintainability.
April 2026
March 2026
14 Commits • 4 Features
Mar 1, 2026March 2026 (2026-03) accomplishments focused on enabling Laplace data support in Clutch, stabilizing the development environment, and strengthening CI/docs and code quality. The work delivered measurable business value by ensuring compatibility with Laplace-formatted data, reducing developer toil through environment stabilization, and improving maintainability and reproducibility across the stack.
March 2026
14 Commits • 4 Features
Mar 1, 2026March 2026 (2026-03) accomplishments focused on enabling Laplace data support in Clutch, stabilizing the development environment, and strengthening CI/docs and code quality. The work delivered measurable business value by ensuring compatibility with Laplace-formatted data, reducing developer toil through environment stabilization, and improving maintainability and reproducibility across the stack.
February 2026
19 Commits • 7 Features
Feb 1, 2026February 2026 monthly summary for logsem/clutch: Delivered foundational RNM sketching and formal proof development leveraging Laplace presampling, expanded the probabilistic language with Laplace tapes, and advanced state logic and check-pointing. Implemented Diffpriv enhancements (logrel port, approxis rules, and related case studies), added a utility for max index listing, and completed code hygiene improvements (N=0 renaming and minor nit). Ongoing effort on Clutch integration with Laplace tapes (WIP) indicates progress toward stabilizing end-to-end workflows. The work strengthens formal verification capabilities, privacy-preserving analysis, and codebase clarity, enabling faster iteration, more reliable features, and stronger business value ahead of next release.
19 Commits • 7 Features
Feb 1, 2026February 2026 monthly summary for logsem/clutch: Delivered foundational RNM sketching and formal proof development leveraging Laplace presampling, expanded the probabilistic language with Laplace tapes, and advanced state logic and check-pointing. Implemented Diffpriv enhancements (logrel port, approxis rules, and related case studies), added a utility for max index listing, and completed code hygiene improvements (N=0 renaming and minor nit). Ongoing effort on Clutch integration with Laplace tapes (WIP) indicates progress toward stabilizing end-to-end workflows. The work strengthens formal verification capabilities, privacy-preserving analysis, and codebase clarity, enabling faster iteration, more reliable features, and stronger business value ahead of next release.
February 2026
January 2026
19 Commits • 3 Features
Jan 1, 2026January 2026 monthly summary for logsem/clutch: Delivered formal-correctness-enhanced sorting, expanded verification tutorials (Eris) and exercises, and major developer experience improvements. These efforts increased reliability, reduced risk in critical data workflows, and improved onboarding for new contributors. Business impact includes more robust sorting, richer verification capabilities, and improved setup/documentation for faster delivery.
January 2026
19 Commits • 3 Features
Jan 1, 2026January 2026 monthly summary for logsem/clutch: Delivered formal-correctness-enhanced sorting, expanded verification tutorials (Eris) and exercises, and major developer experience improvements. These efforts increased reliability, reduced risk in critical data workflows, and improved onboarding for new contributors. Business impact includes more robust sorting, richer verification capabilities, and improved setup/documentation for faster delivery.
December 2025
1 Commits • 1 Features
Dec 1, 2025December 2025 monthly summary for logsem/clutch: Delivered a build-system modernization to Dune with CI updates, aligning dependencies for compatibility with Coq 8.19 and the mathcomp CI Docker image. This work enhances reproducibility, reduces build failures, and lays groundwork for easier maintenance and future migrations across the OCaml/Coq tooling stack.
1 Commits • 1 Features
Dec 1, 2025December 2025 monthly summary for logsem/clutch: Delivered a build-system modernization to Dune with CI updates, aligning dependencies for compatibility with Coq 8.19 and the mathcomp CI Docker image. This work enhances reproducibility, reduces build failures, and lays groundwork for easier maintenance and future migrations across the OCaml/Coq tooling stack.
December 2025
November 2025
14 Commits • 2 Features
Nov 1, 2025November 2025 — logsem/clutch: Implemented key DP framework enhancements, introduced Online RNM module, and fixed critical adaptive counting bug. This work improves privacy guarantees, reliability, and capability for online private queries, while building the foundation for formal verification and robust documentation.
November 2025
14 Commits • 2 Features
Nov 1, 2025November 2025 — logsem/clutch: Implemented key DP framework enhancements, introduced Online RNM module, and fixed critical adaptive counting bug. This work improves privacy guarantees, reliability, and capability for online private queries, while building the foundation for formal verification and robust documentation.
October 2025
5 Commits • 2 Features
Oct 1, 2025October 2025 (logsem/clutch): Delivered core privacy-preserving analytics capabilities and improved the reliability of DP-supported queries. The work focused on expanding automatic private averages, strengthening the differential privacy core, and cleaning up correctness gaps to enable secure data analysis at scale.
5 Commits • 2 Features
Oct 1, 2025October 2025 (logsem/clutch): Delivered core privacy-preserving analytics capabilities and improved the reliability of DP-supported queries. The work focused on expanding automatic private averages, strengthening the differential privacy core, and cleaning up correctness gaps to enable secure data analysis at scale.
October 2025
September 2025
2 Commits • 2 Features
Sep 1, 20252025-09 monthly summary: Delivered foundational CI and environment setup for logsem/clutch and introduced privacy-friendly resource management. Created a CI workflow and Dockerfile to standardize development environments; added Coq files to support higher-order probabilistic separation logic formal development. Implemented an adaptive budget-based counting mechanism to optimize function execution under privacy constraints. No major bugs fixed within this scope. Business impact includes faster onboarding, reproducible builds, and improved privacy-aware data processing efficiency, enabling clearer resource boundaries and scalability.
September 2025
2 Commits • 2 Features
Sep 1, 20252025-09 monthly summary: Delivered foundational CI and environment setup for logsem/clutch and introduced privacy-friendly resource management. Created a CI workflow and Dockerfile to standardize development environments; added Coq files to support higher-order probabilistic separation logic formal development. Implemented an adaptive budget-based counting mechanism to optimize function execution under privacy constraints. No major bugs fixed within this scope. Business impact includes faster onboarding, reproducible builds, and improved privacy-aware data processing efficiency, enabling clearer resource boundaries and scalability.
June 2025
2 Commits • 1 Features
Jun 1, 2025June 2025 monthly summary for logsem/clutch: Delivered substantial groundwork for security assurance through a formal verification framework for CPA security of KEM/DEM, and made a targeted documentation improvement. These efforts strengthen cryptographic properties proofability, improve maintainability, and set the stage for future formal proofs and audits.
2 Commits • 1 Features
Jun 1, 2025June 2025 monthly summary for logsem/clutch: Delivered substantial groundwork for security assurance through a formal verification framework for CPA security of KEM/DEM, and made a targeted documentation improvement. These efforts strengthen cryptographic properties proofability, improve maintainability, and set the stage for future formal proofs and audits.
June 2025
April 2025
15 Commits • 2 Features
Apr 1, 2025April 2025 monthly performance highlights for logsem/clutch. Delivered substantive formal verification work strengthening cryptographic proofs and improved proof engineering stability. Two main feature streams were advanced: (1) formal verification enhancements for ElGamal security proofs and PRF-CPA framework, and (2) LR intro tactic and coupling proof enhancements within the relational verification framework. The work encompassed 15 commits across these streams, driving higher assurance for cryptographic primitives and improving maintainability of the verification codebase.
April 2025
15 Commits • 2 Features
Apr 1, 2025April 2025 monthly performance highlights for logsem/clutch. Delivered substantive formal verification work strengthening cryptographic proofs and improved proof engineering stability. Two main feature streams were advanced: (1) formal verification enhancements for ElGamal security proofs and PRF-CPA framework, and (2) LR intro tactic and coupling proof enhancements within the relational verification framework. The work encompassed 15 commits across these streams, driving higher assurance for cryptographic primitives and improving maintainability of the verification codebase.
November 2024
1 Commits • 1 Features
Nov 1, 2024November 2024 — logsem/clutch delivered concrete quantitative enhancements to Tachis appendix: added an expected value example with a reference, refactored the toss definition for clarity, and introduced a new op_ert fact to bound the expected running time of a targeted operation. No major bugs reported; improvements strengthen analytical rigor and performance forecasting, setting a foundation for reliable math-based decisions and faster contributor onboarding.
1 Commits • 1 Features
Nov 1, 2024November 2024 — logsem/clutch delivered concrete quantitative enhancements to Tachis appendix: added an expected value example with a reference, refactored the toss definition for clarity, and introduced a new op_ert fact to bound the expected running time of a targeted operation. No major bugs reported; improvements strengthen analytical rigor and performance forecasting, setting a foundation for reliable math-based decisions and faster contributor onboarding.
November 2024
October 2024
1 Commits • 1 Features
Oct 1, 2024Month: 2024-10 — Focused on strengthening cryptographic reasoning and security proofs in logsem/clutch. Delivered refactoring and new definitions to support robust probabilistic semantics and security bounds, improving maintainability and laying groundwork for stronger security guarantees.
October 2024
1 Commits • 1 Features
Oct 1, 2024Month: 2024-10 — Focused on strengthening cryptographic reasoning and security proofs in logsem/clutch. Delivered refactoring and new definitions to support robust probabilistic semantics and security bounds, improving maintainability and laying groundwork for stronger security guarantees.
Activity
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Quality Metrics
Correctness88.4%
Maintainability84.2%
Architecture85.8%
Performance80.6%
AI Usage30.0%
Skills & Technologies
Programming Languages
CoqDockerfileJSONMarkdownOCamlYAML
Technical Skills
Abstract AlgebraCI/CDCode ReviewContainerizationCoqCoq developmentCryptographic ProofsCryptographyDevOpsDockerDocumentationFormal VerificationFunctional ProgrammingMathematical LogicNumber Theory
Repositories Contributed To
Overview of all repositories you've contributed to across your timeline