Proposed Features Hardware Key Login Description: Enable FIDO2/U2F hardware keys for 2FA or passwordless login. Implementation: Support YubiKey, Titan, etc., with fallback options (e.g., authenticator codes). Benefits: Phishing-resistant authentication for secure access across platforms. Passkey Authentication Description: Integrate FIDO2 passkeys for passwordless login via hardware keys or device biometrics. Implementation: Support device-native passkeys (e.g., Windows Hello, Face ID) and key-based passkeys. Benefits: Simplifies login while maintaining high security. Encryption Key Management Description: Store XSalsa20 encryption keys on hardware keys for zero-knowledge security. Implementation: Support secure key storage and rotation, with encrypted recovery codes. Benefits: Strengthens encryption by keeping keys off vulnerable devices. Technical Considerations Use FIDO2/U2F standards for compatibility. Ensure cross-platform support (web, desktop, mobile). Protect against key cloning and align with S3Drive’s quantum-resistant encryption. Benefits Phishing-resistant, passwordless authentication. Secure encryption key storage. Alignment with industry trends (e.g., Apple, Microsoft passkeys).