A Revolutionary Leap
The VIC cipher can be regarded as the evolutionary pinnacle of the Nihilist cipher family.
The VIC cipher has several important integrated components, including mod 10 chain addition, a lagged Fibonacci generator (a recursive formula used to generate a sequence of pseudorandom digits), a straddling checkerboard, and a disrupted double transposition.
Until the discovery of VIC, it was generally thought that a double transposition alone was the most complex cipher an agent, as a practical matter, could use as a field cipher.
Read more about this topic: VIC Cipher
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“Dance with a girl three times, and if you like the light of her eye and the tone of voice with which she, breathless, answers your little questions about horseflesh and music—about affairs masculine and feminine,—then take the leap in the dark.”
—Anthony Trollope (1815–1882)