Koj puas tuaj yeem txiav txim siab sha256?
Koj puas tuaj yeem txiav txim siab sha256?

Video: Koj puas tuaj yeem txiav txim siab sha256?

Video: Koj puas tuaj yeem txiav txim siab sha256?
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SHA256 yog hashing muaj nuj nqi, tsis yog encryption muaj nuj nqi. Thib ob, txij li SHA256 Nws tsis yog kev ua haujlwm encryption, nws tsis tuaj yeem decrypted. Yog li ntawd, SHA256 tsis tuaj yeem thim rov qab vim nws yog ib qho ib - txoj kev ua haujlwm.

Cov lus nug tseem yog, yog Sha 256 thim rov qab?

SHA - 256 tsis yog thim rov qab . Hash functions yog siv los ua ib txoj hauv kev. Lawv coj cov ntaub ntawv (cov lus) thiab suav cov txiaj ntsig hash (digests). Siv SHA - 256 ntawm cov ntaub ntawv ntawm 750,000 tus cim, peb tau txais tsuas yog 64 tus lej digest.

Ib yam li ntawd, sha256 encryption ua haujlwm li cas? SHA-256 tsim ib qho yuav luag- cim 256-ntsis (32-byte) kos npe rau cov ntawv nyeem. Saib hauv qab no rau qhov chaws. Ib hash tsis yog ' encryption ' - nws tsis tuaj yeem decrypted rov qab mus rau cov ntawv qub (nws yog 'ib txoj kev' cryptographic muaj nuj nqi, thiab yog qhov loj me me rau txhua qhov loj ntawm cov ntawv nyeem).

Kuj nug, nws yuav siv sij hawm ntev npaum li cas los decrypt Sha 256?

To crack a hash , koj yuav tsum tsis yog thawj 17 tus lej kom phim qhov muab hash , tab sis tag nrho 64 ntawm tus lej kom phim. Yog li, extrapolating los ntawm saum toj no, nws yuav coj 10 * 3.92 * 10^56 feeb kom tawg a SHA256 ua siv tag nrho cov mining zog ntawm tag nrho bitcoin network. Qhov ntawd yog ib ntev sij hawm.

Puas yog sha256 ruaj ntseg?

xaj 256 tsis yog tsim los rau hash passwords. a ruaj ntseg txoj hauv kev kom tau txais tus yuam sij cryptographic los ntawm tus password muab, tab sis nws cov khoom ua rau nws kuj tsim nyog rau kev khaws tus password.

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