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Affine Cipher Tool

Encrypt and decrypt with affine cipher (ax + b mod 26). Includes brute force mode and modular inverse calculator.

100% Private - Runs Entirely in Your Browser

No data is sent to any server. All processing happens locally on your device.

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⚠️ Security Notice

This tool is provided for educational and authorized security testing purposes only. Always ensure you have proper authorization before testing any systems or networks you do not own. Unauthorized access or security testing may be illegal in your jurisdiction. All processing happens client-side in your browser - no data is sent to our servers.