Iinkcukacha kwiNkqubo yoLwazi lweNgcaciso yePfitzner
Indlela yePfitzner yindlela yokwenza isetyenzisiweyo esekelwe kwi-software eyakhiwe nguRoy Pfitzner ngokuchithwa kwedatha kwi- hard drive okanye enye idivayisi yokugcina.
Ukusebenzisa indlela yokuhlanjululwa kwedatha ku-Pfitzner kuya kuthintela zonke iinkqubo zokubuyisela iifayile ezisekelwe kwi-software ukufumana ulwazi kwi-drive, kwaye kuya kunokwenzeka ukukhusela iindlela ezininzi zokubuyisela ezisekhompyutheni ezisuka kwiinkcukacha zokukhupha ulwazi.
Izintlu zethu zeefayile zokufaka izicelo zefayile kunye neenkqubo zokubhubhisa idatha zibandakanya iprogram esebenzisa iindlela zokucocwa kwedatha njengePfitzner ukuba ibhale ngaphezulu ezinye iifayile kwisitoreji sokugcina okanye yonke into, kuquka yonke inkqubo yokusebenza .
Indlela yePfitzner isebenza njani?
Kukho iindlela ezininzi ezahlukeneyo zokususa idatha kwaye nganye iyahamba ngokuchithwa kwedatha nje ngokuncinane kunezinye. Ngokomzekelo, abanye bangasebenzisa ii-zeros nje ezifana nokubhala iZero , ii-zeros kunye nezinto ezinjengeNqakrazo Ekhusekileyo , okanye udibaniso lwama-zeros, kunye neentlobo ezingenanto, njengendlela ye- VSITR ne- Schneier .
Nangona ezininzi iinkqubo zisebenzise indlela yePfitzner ngale ndlela elandelayo, abanye banokuyitshintsha kwaye basebenzise inani elincinci lokupasa (ezisixhenxe ziqhelekileyo):
- Ukupasa 1 - 33: Ubhala umlinganisi ongenanto
Ngamanye amaxesha kubhaliwe njengePfitzner 33-idlula , iP passzner -pass-7 , random (x33) okanye i- random (x7).
Iphulo: I- Random Data kunye ne- Gutmann umsebenzi ngendlela efanayo kwiPfitzner kuba bobabini basebenzisa iziqulatho zengqungquthela ukuba zibhale ngaphezulu kwedatha, ngokwahlukana kwabo kulele kuphela ukuba zingaphi iipasenti ezenziwa.
"Ukupasa" ngokukodwa maxesha amaninzi indlela yokusebenza. Ngoko kwimeko yendlela yePfitzner, enikezelwa ukuba ibhala ngaphezulu kwedatha kunye neenhlamvu ezingenangqungquthela, yenza njalo kanye okanye kabini kodwa ngamaxesha angama-33.
Ukongeza kule nto, ininzi yesofthiwe iya kukuvumela ukuba usebenze ngendlela yePfitzner ngaphezu kweyodwa. Ngoko ukuba ufanele usebenze le ndlela ngamaxesha angama-50 (ngokuqinisekileyo i-overkill), isofthiwe iya kubhala ngaphezulu kwe-drive ngaphandle kwamaxesha angama-33, kodwa amaxesha angama-1,650 (33x50)!
Ezinye iinkqubo zokutshatyalaliswa kwedatha zingaqinisekisa kwakhona ukupasa emva kokuba zigqibile. Oku kuchaza ukuba isofthiwe ihlola ukuba ulwazi lwalo luye lwabhalwa ngeelwimi ezingenanto (okanye nayiphi na imifanekiso indlela esekela ngayo). Ukuba inkqubo yokuqinisekisa ihluleka, le nkqubo iya kukwazisa okanye iqhube indlela ngokuzenzekelayo de idlule ukuqinisekiswa.
Iprojekti Exhasa Inkqubo yePfitzner
Indlela ye-sanitization yedatha ye-Pfitzner ayikho enye eyaziwayo, kodwa kukho iiprogram ezibandakanya njengendlela yokukhetha.
I-Catalano Ekhuselekileyo Susa iprogram engasebenzisa indlela yePfitzner. Njengowona uninzi lwefayile kunye neprogram yokubhubhisa idatha, iphinde isekele ezinye iindlela ezininzi njenge- NAVSO P-5239-26 , iData engaHlomelo , AR 380-19 , i- DoD 5220.22-M , kunye ne- GOST R 50738-95 .
Ezinye iifayile ezifanayo ziquka iFayile eyiNgcaciso yeFayile , i- Freeraser ne- Eraser . Ezi nkqubo zinokucima iifayile ezithile kunye neefolda zisebenzisa indlela efanayo kodwa engafaniyo nePfitzner. Umzekelo, unokukhetha indlela yeGutmann kwezinye zezi nkqubo ukuba ubhale ngaphezulu kwezi zihlandlo ezingama-35, kodwa azixhasi ngokukodwa indlela yePfitzner.
Ukuba ukhona kwi-Mac, i-SecureRemove isekela i-P passzner engu-33 kunye nezinye iindlela ezinjenge-4-idlula i-RAZER, i-DoD 5220.22-M (E) kunye ne-GOST R 50739-95.
I-CBL Data Shredder kunye ne- DBAN ezinye iinkqubo ezimbini zokutshatyalaliswa kwedatha ezingabhala ngaphezulu i-hard drive drive (kungekhona iifayile / iifolda ezithile, kodwa yonke into) kunye neelwimi ezingenangqungquthela. Kwinkqubo eninzi ngokulinganayo ifana nePfitzner, ekubeni akukho nxaxheba kule nkqubo ixhasa ngokuthe ngqo, unokwazi ukusebenzisa indlela yokuhlanjululwa njengeNgcaciso yedata ukuze usule i-drive kaninzi kangangoko uyithandayo.
I-BitRaser ayikhululekile kodwa ifana ne-CBL Data Shredder kunye ne-DBAN yaye ngokwenene ixhasa uPfitzner, ngokukodwa.
Ukuqhawula ngumzekelo wenkqubo enokwenza kokubili: ukuhlahlela iifayile nganye kunye nokuqhuba nzima, kuxhomekeke kwindlela okhetha ukuyisebenzisa.
Ngaba Ufanele Usebenzise I-Pfitzner Method?
URoy Pfitzner, umdali wale ndlela yokuchithwa kwedatha, utshilo ukuba idatha ingakwazi ukufunyanwa xa ibhalwe ngaphezulu kuphela ngamaxesha angama-20, kwaye ukubhala amagama angabonakaliyo angaphezu kwama-30 kufuneka abe ngokwaneleyo. Nangona kunjalo, ingaba oku kuchanekileyo kuqhutywe kwingxoxo.
Kuye kwathiwa ukuba inani leipasenti ezenziwe ngeGroumann (ebhala amanqaku angama-35) ayikho imfuneko kuba kubalulekile ukuba kudlula abantu abancinci. Unokufunda okunye malunga naloo apha: Iyiphi indlela yeGutmann? .