IronVest for GitHub is a two-factor authentication solution designed to protect GitHub accounts from SIM swap attacks. The product provides virtual (masked) phone numbers that users can configure for receiving 2FA codes instead of using their actual phone numbers. The solution routes 2FA codes through IronVest's masked phone numbers, which are protected by a biometric fraud prevention platform. This approach prevents codes from being sent to users' actual phones, eliminating the risk of SIM swapping attacks where attackers transfer a victim's phone number to their own device. The biometric authentication system uses decentralized technology to store personally identifiable information (PII) and biometric templates. Rather than maintaining data in a centralized database, the system distributes information across multiple locations to reduce the risk of compromise. Users authenticate with biometrics to access their 2FA codes, ensuring that only authorized individuals can receive authentication codes for their GitHub accounts. The masked phone numbers serve as an intermediary layer between GitHub's 2FA system and the user's actual contact information.