March 2026 focused on performance optimization and formal verification for cryptographic routines in the pq-code-package/mlkem-c-aarch64 repository. Delivered AVX2-accelerated Keccak f1600 x4, replaced intrinsics with assembly, and established formal correctness proofs via CBMC and HOL Light. No critical bug fixes were reported; primary work centered on performance, reliability, and cross-architecture verification.

Month 2025-05: Focused on strengthening cryptographic primitives verification, licensing compliance, and code quality in pq-code-package/mldsa-native. Delivered formal verification framework and proofs for keccak and shake primitives, updated contract bounds per FIPS 202, and refreshed licensing acknowledgments. No major user-facing bugs fixed this month; major work centered on verification rigor, build support, and licensing documentation.

Monthly summary for 2025-04: Delivered reliability, correctness, and governance improvements across two PQ code packages, with a focus on formal verification, test-harness robustness, and documentation. This work enhances security assurances for cryptographic primitives and improves maintainability for open-source contributors and downstream projects.

Month: 2025-03 — Focused on delivering reliability through formal verification for a core numeric operation in the mldsa-native codebase. Key features delivered include formal specifications and proofs for poly_sub in mldsa/poly.c, with timing variable declarations, loop invariants, and contracts prepared for verification. A verification harness and accompanying Makefile were added under proofs/cbmc/poly_sub to enable automated CBMC verification of poly_sub. The changes are captured in commit 0a7918373746ad1ed449039225ab0ea084a4ebfe with message: 'Add spec and proof for poly_sub'. Major bugs fixed: none reported this month; the primary focus was establishing formal verification for robustness. Overall impact and accomplishments: significantly strengthens correctness guarantees for poly_sub, reduces risk of regression in critical numeric paths, and creates a reusable verification framework to accelerate future QA and development. Technologies/skills demonstrated: formal verification (CBMC), formal specifications, loop invariants, timing analysis, contract-based verification, C programming, Makefile automation, verification harness design.