Straddling Checkerboard Tutorials and Guides

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Straddling Checkerboard
March 19, 2026
14 min read

Straddling Checkerboard & VIC Cipher: Cold War Spy Encryption Explained

From 16th-century Vatican cryptography to Cold War Soviet espionage, the straddling checkerboard cipher has a remarkable history. Learn how this variable-length substitution system works, how the VIC cipher incorporated it, and why the NSA could not break it.

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