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The Copiale cipher is a substitution cipher. It is not a 1-for-1 substitution but rather a homophonic cipher: each ciphertext character stands for a particular plaintext character, but several ciphertext characters may encode the same plaintext character. For example, all the unaccented Roman characters encode a space.
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 Jacopo Silvestri in 1526. [ 1 ]
Manifold stylographic writer, using early "carbonic paper" Letter copying book process; Mechanical processes Tracing to make accurate hand-drawn copies; Pantograph, manual device for making drawn copies without tracing, can also enlarge or reduce; Printmaking, which includes engraving and etching. Relief printing including woodcut
This template links to the Cornell University Law School U.S. Code database and allows for linking to specific titles and sections of the United States Code. Template parameters [Edit template data] Parameter Description Type Status Title 1 The title number of the U.S. Code. Example 26 Number required Section 2 The section number of the U.S. Code. Example 501 Number required End section 3 The ...
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Kuznyechik – Russian 128-bit block cipher, defined in GOST R 34.12-2015 and RFC 7801. LION – block cypher built from stream cypher and hash function, by Ross Anderson; LOKI89/91 – 64-bit block ciphers; LOKI97 – 128-bit block cipher, AES candidate; Lucifer – by Tuchman et al. of IBM, early 1970s; modified by NSA/NBS and released as DES
On the right is the paper tape transport mechanism that was dubbed the "bedstead" because of a resemblance to an upended metal bed-frame. [ 1 ] Heath Robinson was a machine used by British codebreakers at the Government Code and Cypher School (GC&CS) at Bletchley Park during World War II in cryptanalysis of the Lorenz cipher .