Kev txhais ntawm SHA-1 thiab Li Cas Nws Siv Tau Los Qhia Txog Cov Ntaub Ntawv
SHA-1 (luv luv rau kev ruaj ntseg Hash Algorithm 1 ) yog ib qho ntawm ntau tus cryptographic hash functions .
SHA-1 feem ntau siv los xyuas tias cov ntaub ntawv tau hloov tsis tau. Qhov no yog ua los ntawm kev tsim cov checksum ua ntej cov ntaub ntawv raug xa mus, thiab tom qab ntawd dua thaum nws ncav cuag nws lub hom phiaj.
Cov ntaub ntawv kis tau yuav xam tau qhov tseeb tsuas yog tias ob leeg checksums zoo tib yam .
Keeb Kwm & Amp; Qhov ua haujlwm ntawm SHA Hash Function
SHA-1 tsuas yog ib qho ntawm plaub lub ntsiab ntawm Algorithms nyob hauv Tsev Neeg Khoos Haum Uas Muaj Hwj Algorithm (SHA). Feem ntau yog tsim los ntawm US National Security Agency (NSA) thiab luam tawm los ntawm National Institute of Standards thiab Technology (NIST).
SHA-0 muaj ib kab lus 160-ntsis (qhov muaj nuj nqi) hash thiab yog thawj version ntawm no algorithm. SHA-0 hash values yog 40 tug lej ntev. Nws tau luam tawm raws li lub npe "SHA" hauv xyoo 1993 tab sis tsis siv ntau daim ntawv sau npe vim nws tau hloov sai nrog SHA-1 hauv 1995 vim muaj kev nyab xeeb kev ruaj ntseg.
SHA-1 yog qhov thib ob ntawm qhov kev ua no cryptographic hash. SHA-1 kuj muaj cov lus qhaj ntawm 160 cov khoom thiab nrhiav kom muaj kev ruaj ntseg los ntawm kev kho qhov tsis muaj zog nyob hauv SHA-0. Txawm li cas los, hauv xyoo 2005, SHA-1 kuj pom tias tsis muaj kev ruaj ntseg.
Thaum NPLAI tsis pom muaj qhov tsis zoo, SHA-1 muaj zog tshaj SHA-1 thiab kev tawm tsam ua rau SHA-2 tsis pom zoo kom tshwm sim nrog lub zog tam sim no.
Tsis yog tsoomfwv cov koom haum xwb, tab sis txawm cov tuam txhab zoo li Google, Mozilla, thiab Microsoft muaj tag nrho cov kev npaj pib txwv tsis pub SHA-1 SSL daim ntawv pov thawj los yog tau txwv cov hom phab ntawm kev thau khoom.
Google muaj cov pov thawj ntawm SHA-1 kev sib tsoo uas ua rau qhov no tsis muaj kev ruaj khov rau kev tsim cov cim checksums, seb nws yog hais txog ib lo lus zais, cov ntaub ntawv, los yog lwm cov ntaub ntawv. Koj tuaj yeem luam ob cov ntaub ntawv PDF los ntawm SHAttered seb qhov no ua haujlwm li cas. Siv lub tshuab SHA-1 los hauv qab ntawm nplooj ntawv no los tsim cov checksum rau ob qho tib si, thiab koj yuav pom tau tias tus nqi yog tib yam txawm tias lawv muaj cov ntaub ntawv sib txawv.
SHA-2 & amp; SHA-3
SHA-2 tau luam tawm xyoo 2001, ob peb xyoos tom qab SHA-1. SHA-2 suav txog 6 hash ua haujlwm nrog ntau qhov ntau qhov sib tw: SHA-224 , SHA-256 , SHA-384 , SHA-512 , SHA-512/224 , thiab SHA-512/256 .
Cov tsim tawm los ntawm cov neeg tsim khoom tsis yog NSA thiab tso tawm los ntawm NIST hauv xyoo 2015, yog lwm tus tswvcuab ntawm Tsevneeg Khab Alashithm Secure Hash Algorithm, hu ua SHA-3 (yav dhau los Keccak ).
SHA-3 tsis yog los hloov SHA-2 li yav tas los versions tau meant los hloov cov xub ua ntej. Xwb, SHA-3 yog tsim los ua lwm txoj haujlwm rau SHA-0, SHA-1, thiab MD5 .
SHA-1 Siv Tau Li Cas?
Ib qho piv txwv hauv ntiaj teb uas SHA-1 siv tau yog thaum koj nkag mus rau koj tus password rau hauv lub vev xaib ntawm nplooj ntawv. Txawm tias nws tshwm sim hauv keeb kwm tsis muaj koj txoj kev paub, nws yuav yog txoj hauv kev siv lub website siv los ua pov thawj tias koj tus password yog qhov tseeb.
Hauv qhov ua piv txwv no, xav txog tej yam koj sim ua kom nkag mus rau lub website uas koj nquag tuaj saib. Txhua lub sij hawm koj thov kom nkag mus, koj yuav tsum nkag rau hauv koj tus us username thiab password.
Yog tias lub website siv SHA-1 cryptographic hash muaj nuj nqi, nws txhais tau hais tias koj tus password hloov mus rau hauv kev checksum tom qab koj nkag rau hauv. Checksum yog ces piv nrog tus checksum uas muab cia rau hauv lub website uas hais txog koj tus password tam sim no, seb koj puas tau 'tsis tau hloov koj tus password vim koj kos npe los yog koj nyuam qhuav hloov nws lub sij hawm dhau los. Yog hais tias ob qho me me, koj tau tso cai nkag; yog lawv tsis ua, koj tau hais rau tus password tsis yog lawm.
Lwm qhov piv txwv uas siv qhov SHA-1 hash muaj peev xwm siv tau yog rau kev kuaj xyuas ntaub ntawv. Qee cov websites yuav muab SHA-1 checksum ntawm cov ntaub ntawv ntawm nplooj ntawv ces kom thaum twg koj download tau cov ntaub ntawv, koj tuaj yeem xyuas cov checksum rau koj tus kheej kom ntseeg tau tias cov ntaub ntawv downloaded yog tib yam li qhov koj npaj mus downloaded.
Tej zaum koj yuav xav tias qhov kev siv tiag tiag nyob hauv hom tshuaj xyuas no. Xav txog qhov koj pom qhov SHA-1 checksum ntawm cov ntaub ntawv ntawm tus tsim tawm lub website tab sis koj xav mus download tau tib lub version ntawm ib lub website txawv. Koj yuav ces ua kom cov SHA-1 checksum rau koj download thiab sib piv nrog rau txoj kev checksum ntawm tus tsim tawm phab download.
Yog tias ob leeg sib txawv ces nws tsis yog txhais tau hais tias cov ntaub ntawv cov ntsiab lus tsis zoo tib yam, tiam sis qhov ntawd yuav muaj peev xwm muab zais rau hauv cov ntaub ntawv, cov ntaub ntawv yuav raug kev puas tsuaj thiab ua kev puas tsuaj rau koj cov ntaub ntawv hauv computer, cov ntaub ntawv tsis yog txhua yam ntsig txog tiag tiag cov ntaub ntawv, thiab lwm yam.
Txawm li cas los xij, nws kuj tseem yog txhais tau hais tias ib cov ntaub ntawv nruab nrab yog tus laus dua qhov kev zov me nyuam dua li lwm qhov txij li ntawd txawm tias qhov tsawg ntawm qhov kev hloov yuav ua kom muaj tus nqi checksum tshwj xeeb.
Koj tuaj yeem xav tshawb xyuas tias cov ntaub ntawv ob yog zoo tib yam yog tias koj tabtom txhim kho cov kev pabcuam lossis lwm yam kev pabcuam lossis hloov tshiab vim qhov teebmeem tshwm sim yog tias qee cov ntaub ntawv tsis muaj nyob rau lub sijhawm teeb.
Saib Xyuas Yuav Ua Li Cas Xaiv Tus Txheeb Xyuas Ntaub Ntawv Hauv Qhov Ncauj Lus Nrog FCIV rau kev qhia luv ntawm cov txheej txheem no.
SHA-1 Checksum Calculators
Ib lub tshuab xam phaj tshwj xeeb tuaj yeem siv los txiav txim siab txog kev checksum ntawm cov ntaub ntawv los yog ib pawg ntawm cov cim.
Piv txwv, SHA1 Online thiab SHA1 Hash yog cov cuab yeej pub dawb hauv online uas tsim tau SHA-1 checksum ntawm ib pawg ntawm cov ntawv nyeem, cov cim, thiab / lossis cov zauv.
Cov web sites yuav, piv txwv li, tsim cov SHA-1 checksum ntawm bd17dabf6fdd24dab5ed0e2e6624d312e4ebeaba rau cov ntawv nyeem pAssw0rd! .
Saib Dab Tsi Yog Checksum? rau qee yam lwm yam cuab yeej dawb uas tuaj yeem nrhiav cov checksum ntawm cov ntaub ntawv hauv koj lub computer thiab tsis yog ib txoj hlua ntawm cov ntawv nyeem.