HMAC Calculator

Overview

The HMAC (Hash-based Message Authentication Code) Calculator is a powerful tool for generating and verifying message authentication codes. HMAC combines a cryptographic hash function with a secret key to provide both data integrity and authenticity verification.

Features

• Multiple HMAC Algorithms: Support for HMAC-SHA1, HMAC-SHA256, HMAC-SHA384, and HMAC-SHA512
• Flexible Key Input: Support for text, hexadecimal, and Base64 key formats
• Message Authentication: Calculate HMAC for text messages or files
• HMAC Verification: Verify HMAC values to ensure data integrity
• Key Generation: Generate secure random keys for HMAC calculation
• File Support: Calculate HMAC for files with drag-and-drop functionality
• Output Formats: Choose between hexadecimal and Base64 output
• History Tracking: Keep track of recent HMAC calculations

Use Cases

• API Authentication: Secure API requests with HMAC signatures
• Data Integrity: Verify that data hasn't been tampered with
• Message Authentication: Ensure messages come from authenticated sources
• Webhook Security: Secure webhook payloads with HMAC verification
• File Integrity: Verify file integrity with HMAC checksums

Security Features

• Cryptographic Security: Uses industry-standard HMAC algorithms
• Key Management: Secure key generation and handling
• Algorithm Selection: Choose appropriate HMAC algorithm for your security needs
• Verification Support: Built-in HMAC verification functionality

Best Practices

• Use HMAC-SHA256 or higher for new applications
• Generate keys using cryptographically secure random number generators
• Use different keys for different purposes or applications
• Regularly rotate HMAC keys in production environments