Kusiyana pakati pa SHA-1, SHA-2, SHA-256 hashi algorithms
Kusiyana pakati pa SHA-1, SHA-2, SHA-256 hashi algorithms
Tiyeni tiyambe pofotokozera chidule cha algorithm.
Hashi aligorivimu ndi ntchito masamu amene condenses deta kuti ndi kukula kokhazikika, mwachitsanzo ngati titatenga chiganizo chilichonse "Ola ali ndi mphaka" ndi kuthamanga izo kudzera wapadera CRC32 aligorivimu tidzapeza chidule "b165e001". Pali ma aligorivimu ambiri ndipo onse ali ndi zolinga zenizeni, ena amasinthidwa kukhala mtundu wa data, ena ndi achitetezo.
Kwa ife, ofunikira kwambiri ndi ma SHA algorithms.
SHA - imayimira Algorithm Yotetezedwa Yotetezeka - imagwiritsidwa ntchito pa chitetezo cha cryptographic. Chofunikira kwambiri pamalingaliro awa ndikosasinthika ndikusiyana kwa hashi. Zosasinthika - zidziwitso zoyambirira zidzakhala zotetezeka komanso zosadziwika. Kupadera - magawo awiri amtundu wa data sangapangitse kiyi yemweyo.
Siginecha ya digito ndiyovuta kwambiri - kusintha kulikonse pachikalatacho kudzasintha siginecha. Ngati titatenga chiganizo chomwe tatchula pamwambapa "OLA MA KOTA" ndikuchilemba m'zilembo zazikulu, tipeza chidule cha "baa875a6" chosiyana kotheratu. Chidule china chimatanthauza kuti siginecha sikugwiranso ntchito.
SHA-1 NDI SHA-2 ndi mitundu iwiri ya algorithm. Ndizosiyanasiyana malinga ndi zomanga komanso kutalika pang'ono. SHA-2 ndi mtundu wosinthika wa SHA-1.
SHA-1 ndi mabatani 160 kutalika
SHA-2 imapezeka m'malo osiyanasiyana, nthawi zambiri mumagundana 256
Mtengo waukulu wa hashi umapereka chitetezo chachikulu. Chiwerengero cha mafotokozedwe apadera amatha kufotokozedwa ngati nambala, mwachitsanzo kwa SHA-256 pali 2 256 kuphatikiza kotheka. 2 256 chiwerengero chachikuluchi chimaposa mchenga padziko lapansi.
Ngati satifiketi ya wogwiritsa ntchitoyo idakhazikitsidwa ndi SHA-1 (ndipo ndi yolondola, chifukwa idaperekedwa Julayi 1 isanakwane), siginecha yomwe idapangidwa (pambuyo pa Julayi 1) yotsimikizika ndi satifiketi iyi iyenera kukhala ndi chidule cha zomwe zidasainidwa zomwe zimawerengedwa ndi SHA-2 algorithm (osati SHA-1). Chifukwa chake mapulogalamu ndi machitidwe a IT sayenera kuthana ndi ziphaso zatsopano zokha, koma koposa zonse amapanga siginecha ndi zisindikizo mukamagwiritsa ntchito hash molingana ndi SHA-2.
Mapulogalamu omwe timayika lero amalola kugwira ntchito zogonjera ndikutsimikizira ma signature amagetsi pogwiritsa ntchito SHA-2 hash.
Zimangotenga mphindi zochepa, kuyimba foni kapena kulemba kuti mudziwe zambiri zamasaina amagetsi oyenerera.
Pansipa pamafunika ma siginecha amagetsi:
