CIPHER/TRANSPOSITION CIPHERS

Transposition ciphers

The characters all survive; only their positions change. Frequency is untouched, order is destroyed.

Girolamo Cardano's grille is a sheet of stiff paper with holes cut in it. Lay it over a blank page, write the message through the…

· S · · E · · C · · R · · · · · · · E · · · T …

Columnar transposition is the workhorse of classical field ciphers: simple enough to do with a pencil, strong enough to be worth…

OEP LET OVO MRS NSX…

The scytale does not rename letters — it shuffles them. Wind a strip of leather around a wooden staff, write across the turns…

TOESP EHOAA AREMV LTNLW ELTS…