Developed a WebAuthn-based wallet creation security enhancement for the BitGoJS repository, enabling the integration of WebAuthn information during wallet provisioning. This feature encrypts user private keys with a passphrase derived from WebAuthn devices, reducing exposure risk and supporting future authentication flows. The work involved updating wallet generation logic, implementing robust WebAuthn data validation, and refining encryption strategies within a TypeScript and JavaScript backend codebase. Focused on API development and backend security, the implementation addressed both validation and encryption concerns, resulting in a more secure wallet creation process without introducing new bugs during the development period. No bug fixes were required.