In 1972, ka dib markii ay soo gabagabeeyeen daraasad ku saabsan baahiyaha amniga kombiyuutarka ee dawladda Mareykanka, hay'adda heerarka Mareykanka ee NBS (Xafiiska Qaranka ee Heerarka) - oo hadda loo yaqaan NIST (Machadka Qaranka ee Heerarka iyo Teknolojiyada) - ayaa aqoonsaday baahida loo qabo heer dowladeed oo dhan oo loogu talagalay siraynta macluumaadka aan qarsoodiga ahayn, xasaasiga ah. Sidaa darteed, 15-kii Maajo 1973, ka dib markii ay la tashatay NSA, NBS waxay weydiisatay soo jeedinno loogu talagalay sirta oo buuxin doonta shuruudaha naqshadeynta adag. Mid ka mid ah soo jeedinta, si kastaba ha ahaatee, ma aysan u muuqan mid ku habboon. Codsi labaad ayaa la soo saaray 27-kii Ogosto 1974. Markan, IBM waxay soo gudbisay musharrax la aqbali karo - sir lagu sameeyay muddadii 1973-1974 oo ku saleysan algorithm hore, oo ay ku lug lahayd Lucifer Feistel Horst.
horraantii 1970-yadii