Kev tshem cov ntaub ntawv ntawm koj lub computer mus tas li tsis yog ib txoj haujlwm yooj yim uas nws yuav zoo li thaum xub thawj. Thaum muab cov ntaub ntawv tshem tawm, cov ntaub ntawv hais txog nws nyob hauv cov ntaub ntawv cov ntaub ntawv tshem tawm. Cov cim ua pawg yog qhov khoob tuaj yeem nyeem nrog siv cov phiaj xwm tshwj xeeb. Koj tuaj yeem ua li cas kom ua tiav cov ntaub ntawv lwv kom tiav?
Nws yog qhov tsim nyog
Cov lwv
Cov Lus Qhia
Kauj ruam 1
Txiav txim siab txog cov ntaub ntawv yuav tsum tau muab tshem tawm. Nws yuav tsum nco ntsoov tias qee pawg ntawm cov ntaub ntawv kuj yuav xav tau rau qee txoj haujlwm. Txheeb xyuas qhov zoo li cas tias cov ntaub ntawv yuav tsum tau muab tshem tawm zoo li yuav siv thiab ua rau koj qhov kev txiav txim siab zaum kawg.
Kauj ruam 2
Sau txhua cov ntaub ntawv kom muab lwv tawm hauv ib lub tais ceev tseg. Cov kauj ruam no yog xaiv tau, tab sis tso cai rau koj rov xav txog yog tias koj xav rho tawm cov ntawv xaiv thiab cov ntawv tais ceev tseg.
Kauj ruam 3
Hu cov ntsiab lus teb ntawv qhia zaub mov los ntawm txoj cai-nias ntawm lub nplaub tshev tsim thiab xaiv lo lus "Rho tawm". Qhov kev txiav txim no yuav txav lub nplaub tshev nrog cov ntawv kom muab pov tseg rau "Pov tseg".
Kauj ruam 4
Hu rau cov kev pabcuam ntawv qhia los ntawm txoj cai-nias rau ntawm lub icon "Pov Tseg" thiab xaiv qhov hais kom ua "Tsis Tau Pov Tseg".
Kauj ruam 5
Txheeb xyuas cov disk uas raug xaiv rau kauj ruam tom ntej ntawm cov ntaub ntawv erasure. Cov qauv no muaj kev ntseeg siab dua li tsuas sau cov ntaub ntawv dhau ntawm "Recycle Bin", txij li cov chaw nyob ntawm daim disk tau lwv. Txawm li cas los xij, cov khoos phis tawm koos pis tawj yuav muaj peev xwm rov qab cov ntaub ntawv feem ntau uas tau nyob ntawm daim disk ua ntej nws tau teeb tsa.
Kauj Ruam 6
Siv daim disk lwv cov qauv. Qhov kev nyab xeeb tshiab thev naus laus zis xyuas kom meej tias cov ntaub ntawv, suav nrog cov khoos phis tawj ntawm tus kheej, tsis muaj qauv txawv. Hauv qhov no, cov algorithm hauv qab no ntawm kev coj ua raug siv:
- xoom - hloov cov ntaub ntawv nrog zeros;
- Hloov cov ntaub ntawv nrog pseudo-random tooj, tso cai zais cia qhov tseeb ntawm cov ntaub ntawv tshem tawm;
- cov ntaub ntawv hloov nrog cov ntaub ntawv los ntawm lub rooj tshwj xeeb. Cov ntaub ntawv yog ntaub ntawv tshaj 3-7 zaug.
- P. Gutman's algorithm (hloov cov ntaub ntawv nrog cov lej los ntawm lub rooj tshwj xeeb. Cov ntaub ntawv rov sau dua txog 35 zaug);
- B. Schneier's algorithm.
Kauj Ruam 7
Rub tawm thiab teeb tsa lub taub hau dawb ntawm Ersaer los lwv cov ntaub ntawv thiab cov ntawv tais ceev tseg.
Kauj ruam 8
Txoj cai-nias rau ntawm cov ntaub ntawv yuav raug muab tshem tawm kom nqa cov ntsiab lus teb ua zaub mov.
Kauj Ruam 9
Thov nco ntsoov tias ib yam khoom tshiab tau tshwm sim hauv cov ntawv qhia zaub mov - Lub lwv, uas muaj ob qho khoom siv me me: Lwv tawm (rho tawm tam sim no) thiab Erase ntawm kev pib dua (rho tawm thaum pib lub computer).
Kauj ruam 10
Nqa cov ntawv ntsiab lus teb ntawm daim disk uas yuav tsum tau siv thiab siv Lwv cov khoom siv tsis raug siv los lwv chaw seem ntawm daim disk.
