fleissner grille

fleissner grille: \\ˈflīsnə(r)-\ noun
Usage: usually capitalized F

Etymology: after Eduard Fleissner von Wostrowitz, Austrian cryptographer

: a square grille designed to be reconstructed from a key word and used for cryptographic transposition without cover text and to be rotated 90 degrees on the paper whenever the spaces are exhausted so that a solid block of transposed ciphertext is produced after four successive turns or sometimes when reversal of the grille is provided for after eight turns

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Grille (cryptography) — In the history of cryptography, a grille cipher was a technique for encrypting a plaintext by writing it onto a sheet of paper through a pierced sheet (of paper or cardboard or similar). The earliest known description is due to the polymath… … Wikipedia
Edouard Fleissner von Wostrowitz — (1825 1888), also spelt Fleißner, is remembered as the author of a short book on cryptography and as the proponent of a modified Cardan grille known as a turning grille . See Grille (cryptography)He was born in Lemberg, the son of an Austrian… … Wikipedia

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