Keyed hash functions for data integrity and authenticity verification. HMAC with multiple underlying hash algorithms and NIST-standard KMAC variants.
Create KMAC128 authentication tags online - NIST SP 800-185 Keccak-based MAC with 128-bit security. Variable-length message authentication with customizable key and personalization strings.
Create KMAC256 authentication tags online - NIST SP 800-185 Keccak-based MAC with 256-bit security. High-assurance message authentication with variable-length output for critical applications.
Create HMAC signatures online - standard message authentication code for API security and JWT tokens. Generate secure MACs with SHA-256, SHA-512, or any hash function for data integrity verification.