Passage: Encrypting File System (EFS) na samar da karfi da kuma mai amfani da m boye-boye na kowane fayil ko babban fayil a kan wani NTFS girma. EFS aiki a tare da EFS sabis, Microsoft ta CryptoAPI da EFS File System Run-Time Library (FSRTL). EFS aiki ta hanyar encrypting wani fayil da wani taro m key (kuma aka sani da File Encryption Key, ko FEK), wanda aka yi amfani da saboda yana daukan wani gwada kananan adadin lokaci zuwa encrypt da decrypt manyan yawa na data fiye da idan wani asymmetric key cipher aka yi amfani.
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