The Cryptanalyst’s Workbench

Field notes

The workbench separates three classical attacks rather than presenting a generic cipher calculator. Caesar analysis compares 27 shifts, affine analysis searches combinations constrained by mcd(a,27)=1, and Vigenère analysis uses repeated-pattern clues through Kasiski alongside chi-squared scoring. The interface also exposes intermediate diagnostics such as coincidence indices and ciphertext frequencies, making the page suitable for following an attack rather than only reading a final answer.