Puas yog sha256 deprecated?
Puas yog sha256 deprecated?

Video: Puas yog sha256 deprecated?

Video: Puas yog sha256 deprecated?
Video: Mang Vang New Song 2020 - puas yog vim kuv [Official Video] 2024, Kaum ib hlis
Anonim

SHA-256 Tam sim no yog kev lag luam-tus qauv kos npe hash algorithm rau SSL daim ntawv pov thawj. SHA-256 muab kev ruaj ntseg zoo dua thiab tau hloov SHA-1 raws li kev pom zoo algorithm. Tsis muaj nqi ntxiv rau kev siv SHA-256 . SHA-1 ua tsis pom zoo ua ib feem ntawm SHA-256 txoj kev npaj tsiv teb tsaws chaw.

Raws li, sha256 puas tseem ruaj ntseg?

xaj 256 tsis yog tsim los rau hash passwords. Txhawm rau hash passwords, koj yuav tsum nyiam siv cov haujlwm hash tsim rau kev siv no. PBKDF2: Nws yog tiag tiag tsim los ua ib qho tseem ceeb stretching muaj nuj nqi, piv txwv li. 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.

Ib tug kuj nug, qhov twg zoo dua sha1 lossis sha256? Ntxiv thiab, SHA 1 kuj tau pom tias muaj kev cuam tshuam rau kev sib tsoo uas yog vim li cas txhua tus browsers yuav tshem tawm kev txhawb nqa rau daim ntawv pov thawj kos npe nrog SHA 1 los ntawm Lub Ib Hlis 2017. SHA256 txawm li cas los xij, tam sim no muaj ntau ntau resistant rau kev sib tsoo tawm tsam raws li nws muaj peev xwm tsim tau ib tug ntev hash uas yog nyuaj rau tawg.

Ntawm no, puas yog SHA 1 deprecated?

NIST officially tsis pom zoo siv ntawm SHA - 1 nyob rau hauv 2011 thiab tsis tso cai nws siv rau digital kos npe rau hauv 2013. Raws li ntawm 2020, tawm tsam tawm tsam SHA - 1 yog cov tswv yim zoo li tawm tsam MD5; xws li, nws raug pom zoo kom tshem tawm SHA - 1 los ntawm cov khoom kom sai li sai tau thiab siv hloov SHA -256 lub SHA -3.

Puas yog Sha 2 thiab Sha 256 tib yam?

Yog li ntawd, SHA - 2 yog ntau yam ntawm hash functions thiab suav nrog SHA - 256 . Cov SHA - 2 tsev neeg muaj ntau yam zoo sib xws hash functions. Nws yog ib qho tseem ceeb ntawm ib qho algorithm uas qee qhov me me tsis sib txawv ntawm cov variants.

Pom zoo: