Rịba ama amaokwu a dị n'okpuru ma zaa ajụjụ ahụ mgbe e mesịrị n'otu asụsụ ahụ dị ka amaokwu ahụ:  Nkọwa: Mmalite nke DES laghachi azụ na mmalite afọ 1970. N'afọ 1972, mgbe ha mechara nnyocha banyere mkpa nchebe kọmputa nke gọọmenti United States, ụlọ ọrụ na-ahụ maka ụkpụrụ nke United States bụ́ NBS (National Bureau of Standards) - nke a na-akpọzi NIST (National Institute of Standards and Technology) - chọpụtara mkpa ọ dị maka ụkpụrụ gọọmenti dum maka izochi ihe ọmụma ndị a na-adịghị ezo ezo na ndị dị oké mkpa. N'ihi ya, na 15 Mee 1973, mgbe ya na NSA kwurịtasịrị, NBS rịọrọ arịrịọ maka cipher nke ga-ezute njirisi njirisi siri ike. Otú ọ dị, ọ dịghị nke ọ bụla n'ime ihe ndị ahụ e kwuru n'elu bụ́ nke kwesịrị ekwesị. A rịọrọ nke abụọ n'August 27, 1974. N'oge a, IBM wepụtara onye a ga-anabata nke a na-ewere dị ka nke a na-anabata - a na-emepụta n'oge 1973-1974 dabere na algorithm mbụ, Horst Feistel's Lucifer cipher. Ndị otu na IBM tinyere aka na nhazi na nyocha nke koodu gụnyere Feistel, Walter Tuchman, Don Coppersmith, Alan Konheim, Carl Meyer, Mike Matyas, Roy Adler, Edna Grossman, Bill Notz, Lynn Smith, na Bryant Tuckerman.  Ajụjụ: Olee oge a na-akpọ DES?
mbido afọ 1970