During April 2026, contributed to the openssl/openssl repository by implementing security hardening for Curve448 scalar halving in C. The work focused on preventing secret-dependent branches by introducing a portable value barrier macro, ensuring constant-time execution across both 32-bit and 64-bit architectures. This approach improved cryptographic resilience and reduced the risk of information leakage without impacting performance. The patch, developed using C programming and cryptography expertise, was reviewed and merged after collaboration with other maintainers. Emphasis was placed on secure coding practices, resulting in a robust solution that maintained code quality and cross-platform consistency for cryptographic operations in OpenSSL.