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Beaufort Cipher Tool

Self-reciprocal polyalphabetic cipher. Same operation encrypts and decrypts with C = (K - P) mod 26.

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.