411 REFERENCE · Wiktionary
Jefferson disk
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
English
Etymology
Commonly attributed to Thomas Jefferson.
Noun
en historical cryptography Any of a set of stackable disks, each having the letters of the alphabet arranged in some sequence around its edge, used in a cipher system.
See also
en Bazeries cylinder
en eponyms