Worked on security hardening for the Synapse repository, focusing on improving OIDC session cookie handling. Implemented the Secure attribute on the oidc_session_no_samesite cookie using Python, ensuring it is transmitted only over HTTPS and aligning its configuration with the existing oidc_session cookie. This backend development effort addressed web security best practices by reducing the risk of cookie leakage and session hijacking in OIDC sessions. The work demonstrated a strong understanding of session management and cookie flag configuration, with clear traceability to the relevant issue. No bugs were fixed during this period, as the primary focus was on this targeted security enhancement.