20-05-2025, 03:33 PM
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- scrambles the positions of characters without changing the characters themselves. The changes in position are regular (e.g. each glyph in the second and fourth column is moved one line down).
- known since antiquity (You are not allowed to view links. Register or Login to view.).
- Effects: remains vulnerable to frequency analysis of individual letters; patterns may be broken up, which may increase conditional entropy.

