August 2025: Implemented TLS 1.3 session resumption with PSK ephemeral key exchange in philips-software/amp-embedded-infra-lib. Key enhancements include signaling new session tickets in the SSL context and client support for MBEDTLS_ERR_SSL_RECEIVED_NEW_SESSION_TICKET to enable seamless resumption. A focused fix (commit 4ecfa560851117639ea76e07d33d7b39e2094b1d) ensures correct TLS 1.3 session resumption behavior. Business impact: significantly reduced handshake latency and CPU usage during reconnects on embedded hardware, improving reliability in intermittent networks. Technologies demonstrated: TLS 1.3, PSK, MBEDTLS, SSL context management, embedded security.

April 2025 monthly summary focused on improving build reliability and crypto library readiness across two repos. Delivered concrete infrastructure and stability improvements with measurable business value: - philips-software/amp-embedded-infra-lib: Mbed TLS upgraded to v3.6.2 with build-system improvements, including alignment to latest defaults, compiler-warnings tweaks, and CI/CD cleanup (VS2019 job removed; minimum Visual Studio version updated). These changes reduce maintenance cost, improve security posture, and shorten release cycles. - espressif/TF-PSA-Crypto: Crypto library build stability and initialization compatibility fixes. Resolved MbedTLS linkage issues by refactoring initialization macros for older C++ standards (Issue 7087), fixed MSVC v142 TLS 1.3 build issue via a type-casting adjustment in psa_reserve_free_key_slot, and rolled back recent crypto_struct.h/crypto.h changes to restore stable crypto operations. These fixes improve cross-compiler reliability and crypto operation correctness. Overall impact: Increased cross-repo build stability, reduced CI churn, and better readiness for security library updates. This supports faster feature delivery and more reliable developer experience. Technologies/skills demonstrated: C/C++, Mbed TLS, MSVC, build-system optimization, dependency management, and macro-based initialization refactoring.

March 2025 focused on strengthening secure communications for philips-software/amp-embedded-infra-lib by upgrading the embedded TLS stack to enable TLS 1.3 and its associated configuration. Delivered upgrade of MBed TLS from 3.2.1 to 3.6.2, with configuration changes to support TLS 1.3, secure key exchange, and improved entropy management. Resolved build issues and session handling problems, adjusted platform-specific time functions, and expanded test coverage with new unit tests for the TLS configuration. These changes were completed with two main commits (46b4fe8c0bc95227959cc5adf0a5f4678c791b98 and c392d44dcd24318a15f3465e6583a002704f8d63) and are aimed at accelerating secure product readiness while reducing maintenance risk.

January 2025 monthly summary for philips-software/amp-embedded-infra-lib focusing on documentation quality improvements and developer experience. No code changes were required beyond documentation updates this month.