February 2026 monthly summary for aws/s2n-tls: Delivered removal of Kyber post-quantum cryptography references, consolidating the codebase around remaining post-quantum key exchange methods. The work included deleting Kyber-related code, tests, and configurations, and updating the test suite to reflect the updated PQ landscape. This reduces complexity, maintenance burden, and potential misconfigurations while preparing the ground for future PQ KEM strategies.

January 2026 performance highlights across aws/s2n-tls and aws/aws-lc. Key features delivered: hybrid post-quantum key exchange support enabled by default in aws-lc, and Kyber KEM deprecation across LibCrypto variants in s2n-tls. Major bugs fixed: removal of Kyber support and related tests to reflect updated security posture. Overall impact and accomplishments: improved TLS resilience against quantum attacks, alignment with updated security standards, and reduced maintenance burden through consolidated cryptographic choices. Technologies/skills demonstrated: TLS internals, post-quantum cryptography integration, default configuration management, test framework updates, and cross-repo collaboration.

December 2025 performance summary for aws/s2n-tls: Delivered TLS policy enhancements and CloudFront PQ-KEM support, strengthening security policy negotiation and post-quantum readiness. Implemented strongly preferred groups for ECC curves and KEMs to improve negotiation outcomes; imported and aligned CloudFront PQ TLS policies, including new test coverage for TLS versions and cipher preferences. No major bugs documented for this period; focus on security policy governance and interoperability with CloudFront.

September 2025: Stabilized TLS group negotiation tests in aws/aws-lc by decoupling test assumptions from specific key exchange configurations. Implemented robustness for scenarios where the default TLS group is changed to X25519MLKEM768, ensuring test suite reliability across configurations and reducing CI flakiness.

June 2025: Delivered PQ TLS Integration Test Stabilization for aws/aws-lc, improving test stability and CI feedback. Implemented timeouts for PQ TLS integration tests, backgrounded TLS CLI tools, and added specific server/client timeouts to prevent hangs even if underlying TLS tools change input handling. This change reduces flaky tests and accelerates validation of TLS features.

May 2025: Focused on improving reliability and efficiency of TLS-related tests in the aws/aws-lc repository. Implemented environment readiness checks and fixed binary path resolution to ensure TLS integration tests run predictably, reducing flaky failures and accelerating feedback for TLS/AWS-LC changes. This work enhances test trust and release confidence by stabilizing the test harness and ensuring required components are present before execution.

Concise monthly summary for 2025-04 focusing on key achievements, business impact, and technical delivery for aws/aws-lc.

In 2025-03, delivered PQ-related updates across three repositories to align with evolving TLS parameters and strengthen security posture, delivering business value through interoperability, compliance, and reduced risk. Key outcomes include updating OpenSSL PQ SupportedGroups in aws/aws-lc, introducing a default PQ TLS cipher policy and tests in awslabs/aws-crt-python, and removing PQ TLS 1.2 support from security policies in aws/s2n-tls. These changes standardize cryptographic configurations across services, improve testing coverage, and position AWS-LC deployments for future cryptographic standards.

February 2025 focused on delivering and hardening post-quantum TLS capabilities across the Java crypto stack and AWS SDK client, with a strong emphasis on security, compliance, and operational readiness. The work enables customers to migrate to post-quantum cryptography with minimal disruption while maintaining compatibility with existing TLS configurations and AWS services.

January 2025 monthly summary for aws/s2n-tls focusing on delivering TLS 1.3 support for PQ code and introducing a deprecation mechanism for security policies. Key outcomes include migration of PQ Rust and PQ Python code to TLS 1.3, removal of deprecated KEM names, updated configurations/tests, new KEM group name retrieval methods, and an API to deprecate security policies with associated error handling and documentation updates. No explicit critical bug fixes were recorded this month; instead, the work improves security posture, maintainability, and user guidance while preserving compatibility.

Month: 2024-11. Focused on security uplift for awslabs/aws-c-io. Key feature delivered: ML-KEM Support in TLS Channel Handler, enabling post-quantum cryptography support. No major bugs fixed this month. Overall impact: strengthens security posture and compliance with newer cryptographic standards; lays groundwork for future PQC transitions. Technologies/skills demonstrated: post-quantum cryptography integration, TLS internals, C codebase changes (enums and checks), careful code review and release alignment.

In 2024-10, delivered a pluggable EVP_KEM API and expanded ML-KEM support in aws/s2n-tls, enabling flexible KEM integration and strengthening security and compliance posture. Key outcomes include decoupled KEM backends, updated FIPS validation readiness, and new TLS policies to govern ML-KEM usage. These changes improve extensibility, reduce future rework, and position the project for rapid KEM adoption.