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- Wadsworth's_cipher abstract "Wadsworth's cipher was a cipher invented by Decius Wadsworth, a Colonel in the Ordnance Corps of the United States Army. In 1817, he developed a progressive cipher system based on a 1790 design by Thomas Jefferson, establishing a method that was continuously improved upon and used until the end of World War II.Wadsworth's system involved a set of two disks, one inside the other, where the outer disk had the 26 letters of the alphabet and the numbers 2-8, and the inner disk had only the 26 letters. The disks were geared together at a ratio of 26:33. To encipher a message, the inner disk was turned until the desired letter was at the top position, with the number of turns required for the result transmitted as ciphertext. Due to the gearing, a ciphertext substitution for a character did not repeat until all 33 characters for the plaintext letter had been used. Wadsworth never got credit for his design because Charles Wheatstone invented an almost identical machine several years after Wadsworth, and got all the credit.".
- Wadsworth's_cipher wikiPageExternalLink Chap2-1.html.
- Wadsworth's_cipher wikiPageExternalLink books?id=N11_m8SJGCMC&pg=PA67&lpg=PA67&dq=%22Decius+Wadsworth%22&source=bl&ots=_yFhKrz5dR&sig=NRucC6laUGLBPmQd_i0cPrP6rSU&hl=en&ei=CBz7SZ-5N4aEtweXtYi7BA&sa=X&oi=book_result&ct=result&resnum=41.
- Wadsworth's_cipher wikiPageExternalLink timeline.html.
- Wadsworth's_cipher wikiPageExternalLink cryptography.html.
- Wadsworth's_cipher wikiPageID "4490660".
- Wadsworth's_cipher wikiPageRevisionID "522060222".
- Wadsworth's_cipher hasPhotoCollection Wadsworth's_cipher.
- Wadsworth's_cipher subject Category:Classical_ciphers.
- Wadsworth's_cipher type Abstraction100002137.
- Wadsworth's_cipher type Cipher106254239.
- Wadsworth's_cipher type ClassicalCiphers.
- Wadsworth's_cipher type Communication100033020.
- Wadsworth's_cipher type Message106253690.
- Wadsworth's_cipher comment "Wadsworth's cipher was a cipher invented by Decius Wadsworth, a Colonel in the Ordnance Corps of the United States Army.".
- Wadsworth's_cipher label "Wadsworth's cipher".
- Wadsworth's_cipher sameAs m.09glbl2.
- Wadsworth's_cipher sameAs Q7959329.
- Wadsworth's_cipher sameAs Q7959329.
- Wadsworth's_cipher sameAs Wadsworth's_cipher.
- Wadsworth's_cipher wasDerivedFrom Wadsworth's_cipher?oldid=522060222.
- Wadsworth's_cipher isPrimaryTopicOf Wadsworth's_cipher.