Advanced Authenticationwith |

Professional multi-factor authentication system supporting TOTP, HOTP, and advanced Challenge-Response protocols. Enterprise-grade security for your applications.

Secure by Design

Industry-standard authentication protocols with modern security features

TOTP

Time-based One-Time Password (RFC 6238). Codes expire every 30 seconds for enhanced security.

  • 30-second validity windows
  • Automatic code refresh
  • Mobile app compatible

HOTP

HMAC-based One-Time Password (RFC 4226). Counter-based generation for event-driven authentication.

  • Counter-based generation
  • One-time use per code
  • Perfect for API access

Challenge-Response

Advanced server-generated challenges with unique responses. Maximum security for high-value transactions.

  • Server-generated challenges
  • Transaction-specific codes
  • Enterprise security

Enterprise-Grade Security

Built with security best practices and industry standards

AES-256 encryption for secrets
bcrypt password hashing
JWT-based authentication
Rate limiting protection
Backup recovery codes
RFC 6238 & 4226 compliant

© 2025 OTP Generator. Professional authentication system.