UPDATE--SHA-1, 25-xyoo-laus hash muaj nuj nqi tsim los ntawm NSA thiab suav tias tsis muaj kev nyab xeeb rau kev siv feem ntau rau 15 xyoo dhau los, tam sim no tau "tag nrho thiab xyaum tawg " los ntawm ib pab neeg uas tau tsim ib qho kev xaiv-prefix sib tsoo rau nws.
SHA tawg thaum twg?
Lub SHA-1 hashing muaj nuj nqi yog theoretically tawg nyob rau hauv 2005; Txawm li cas los xij, thawj qhov kev sib tsoo ua tiav hauv lub ntiaj teb tiag tiag tau ua tiav hauv 2017. Ob xyoos dhau los, kev kawm los ntawm Google thiab CWI tau tsim ob cov ntaub ntawv uas muaj SHA-1 hash tib yam, hauv ntiaj teb thawj zaug SHA-1 kev sib tsoo nres -- hu ua "SHAattered."
Puas SHA-1 puas tseem siv?
SHA-1 tau tawg txij li xyoo 2004, tab sis nws tseem siv ntau lub tshuab ruaj ntseg; peb qhia rau cov neeg siv kom tshem tawm SHA-1 kev txhawb nqa kom tsis txhob muaj kev tawm tsam qis."
Is SHA-1 Crackable?
Thaum cov neeg thib peb ntseeg tau siv SHA-1 los kos npe rau daim ntawv pov thawj ntawm tus kheej, muaj kev pheej hmoo tias PGP tus kheej tuaj yeem ua tus kheej. Yog tias daim ntawv pov thawj tub ceev xwm tau tshaj tawm SHA-1 daim ntawv pov thawj nrog cov lej lej, nws muaj peev xwm X. 509 daim ntawv pov thawj tuaj yeem tawg.
Puas muaj leej twg tawg SHA 256?
Nyob rau hauv kev tshaj tawm tsis ntev los no los ntawm Treadwell Stanton DuPont, qhov kev thov tau ua kom lawv cov chaw soj ntsuam tshawb fawb tau ua tiav tag nrho 64 puag ncig ntawm SHA256 hashing algorithm. Lawv hais ntxiv tias lawv tau ua tiav qhov tseem ceeb no ib xyoos dhau los (lig2018).
