Worked on the rustfs/rustfs repository to enhance backend security by implementing input validation for access keys and identifiers using Rust. Developed a dedicated function to detect and reject any whitespace in access keys and names, addressing potential risks of invalid credentials and misnamed resources. Integrated this validation into the existing backend flow and expanded the test suite to cover a range of edge cases, ensuring robust protection against improper input. The update improved data integrity and security posture for admin-facing features. The work demonstrated a focused approach to backend development, emphasizing thorough validation and comprehensive test coverage within the Rust ecosystem.