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- Jefferson_disk abstract "The Jefferson disk, or wheel cypher as Thomas Jefferson named it, also known as the Bazeries Cylinder, is a cipher system using a set of wheels or disks, each with the 26 letters of the alphabet arranged around their edge. The order of the letters is different for each disk and is usually scrambled in some random way. Each disk is marked with a unique number. A hole in the centre of the disks allows them to be stacked on an axle. The disks are removable and can be mounted on the axle in any order desired. The order of the disks is the cipher key, and both sender and receiver must arrange the disks in the same predefined order. Jefferson's device had 36 disks. [Kahn, p. 194]Once the disks have been placed on the axle in the agreed order, the sender rotates each disk up and down until a desired message is spelled out in one row. Then the sender can copy down any row of text on the disks other than the one that contains the plaintext message. The recipient simply has to arrange the disks in the agreed-upon order, rotate the disks so they spell out the encrypted message on one row, and then look around the rows until he sees the plaintext message, i.e. the row that's not complete gibberish. There is an extremely small chance that there would be two readable messages, but that can be checked quickly by the person coding.First invented by Thomas Jefferson in 1795, this cipher did not become well known and was independently invented by Commandant Etienne Bazeries, the conqueror of the Great Cipher, a century later. The system was used by the United States Army from 1923 until 1942 as the M-94.This system is not considered secure against modern codebreaking if it is used to encrypt more than one row of text with the same ordering of disks (i.e. using the same key). See #Cryptanalysis.".
- Jefferson_disk thumbnail Jefferson's_disk_cipher.jpg?width=300.
- Jefferson_disk wikiPageExternalLink wheel-cipher.
- Jefferson_disk wikiPageID "854993".
- Jefferson_disk wikiPageRevisionID "585577475".
- Jefferson_disk hasPhotoCollection Jefferson_disk.
- Jefferson_disk subject Category:Encryption_devices.
- Jefferson_disk subject Category:Thomas_Jefferson.
- Jefferson_disk type Artifact100021939.
- Jefferson_disk type Device103183080.
- Jefferson_disk type EncryptionDevices.
- Jefferson_disk type Instrumentality103575240.
- Jefferson_disk type Object100002684.
- Jefferson_disk type PhysicalEntity100001930.
- Jefferson_disk type Whole100003553.
- Jefferson_disk comment "The Jefferson disk, or wheel cypher as Thomas Jefferson named it, also known as the Bazeries Cylinder, is a cipher system using a set of wheels or disks, each with the 26 letters of the alphabet arranged around their edge. The order of the letters is different for each disk and is usually scrambled in some random way. Each disk is marked with a unique number. A hole in the centre of the disks allows them to be stacked on an axle.".
- Jefferson_disk label "Cylindre de Jefferson".
- Jefferson_disk label "Dysk Jeffersona".
- Jefferson_disk label "Jefferson disk".
- Jefferson_disk label "Jefferson-Walze".
- Jefferson_disk label "Rullo di Jefferson".
- Jefferson_disk sameAs Jefferson-Walze.
- Jefferson_disk sameAs Cylindre_de_Jefferson.
- Jefferson_disk sameAs Rullo_di_Jefferson.
- Jefferson_disk sameAs 제퍼슨_디스크.
- Jefferson_disk sameAs Dysk_Jeffersona.
- Jefferson_disk sameAs m.03hk6q.
- Jefferson_disk sameAs Q1063471.
- Jefferson_disk sameAs Q1063471.
- Jefferson_disk sameAs Jefferson_disk.
- Jefferson_disk wasDerivedFrom Jefferson_disk?oldid=585577475.
- Jefferson_disk depiction Jefferson's_disk_cipher.jpg.
- Jefferson_disk isPrimaryTopicOf Jefferson_disk.
