A shekara ta 1972, bayan kammala wani binciken kan bukatun tsaro na kwamfuta na gwamnatin Amurka, hukumar kula da ka'idojin Amurka ta NBS (National Bureau of Standards) - yanzu ana kiranta NIST (National Institute of Standards and Technology) - ta gano bukatar ka'idojin gwamnati don ɓoye bayanan da ba a ɓoye ba. A ranar 15 ga Mayu, 1973, bayan tuntuɓar NSA, NBS ta nemi shawarwari don ɓoye wanda zai cika ka'idodin ƙirar ƙira. Babu wani daga cikin abubuwan da aka gabatar, duk da haka, ya zama ya dace. An ba da wata buƙata ta biyu a ranar 27 ga Agusta, 1974. A wannan lokacin, IBM ta gabatar da ɗan takarar wanda aka yarda da shi wanda aka yarda da shi.
farkon shekarun 1970