[PAR] [TLE] Enigma machine [SEP] The Enigma machines were a series of electro-mechanical rotor cipher machines developed and used in the early- to mid-20th century to protect commercial, diplomatic and military communication.  Enigma was invented by the German engineer Arthur Scherbius at the end of World War I.  Early models were used commercially from the early 1920s, and adopted by military and government services of several countries, most notably Nazi Germany before and during World War II.  Several different Enigma models were produced, but the German military models, having a plugboard, were the most complex.  Japanese and Italian models were also in use. [PAR] [TLE] Typex [SEP] In the history of cryptography, Typex (alternatively, Type X or TypeX) machines were British cipher machines used from 1937.  It was an adaptation of the commercial German Enigma with a number of enhancements that greatly increased its security.  The cipher machine (and its many revisions) was used until the mid-1950s when other more modern military encryption systems came into use.
[PAR] [TLE] Enigma machine [ SEP ] The Enigma machines were a series of electro - mechanical rotor cipher machines developed and used in the early- to mid-20th century to protect commercial , diplomatic and military communication . Enigma was invented by the German engineer Arthur Scherbius at the end of World War I. Early models were used commercially from the early 1920s , and adopted by military and government services of several countries , most notably Nazi Germany before and during World War II . Several different Enigma models were produced , but the German military models , having a plugboard , were the most complex . Japanese and Italian models were also in use . [PAR] [TLE] Typex [ SEP ] In the history of cryptography , Typex ( alternatively , Type X or TypeX ) machines were British cipher machines used from 1937 . It was an adaptation of the commercial German Enigma with a number of enhancements that greatly increased its security . The cipher machine ( and its many revisions ) was used until the mid-1950s when other more modern military encryption systems came into use .
Who invented the cipher machine of which Typex was an adaptation ?
Who invented the cipher machine of which Typex was an adaptation ?
Arthur Scherbius
Arthur Scherbius