Other Designs
Instead of a linear driving device, one may use a nonlinear update function. For example, Klimov and Shamir proposed triangular functions (T-Functions) with a single cycle on n bit words.
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“My own thoughts
Are my companions; my designs and labors
And aspirations are my only friends.”
—Henry Wadsworth Longfellow (18071882)
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—Sarah Fielding (17101768)