A ntchito chete ndi: ndichiyani, chifukwa ndi chimene chimachitika

Nthawi zambiri, pamene otsitsira mitsinje kapena owona mwachindunji okha kufotokoza pali chinachake monga «ad33e486d0578a892b8vbd8b19e28754» (mwachitsanzo, mu ex.ua), kawirikawiri ndi cholemba «md5». Mpambo chete - zotsatira kuti zotuluka ndi chete ntchito pambuyo processing deta ukubwera. Mu English ya chete limasonyeza chisokonezo, chamba, udzu, kapena kudya nyama minced ndi masamba. Decrypt ya chete ndi zovuta, tikhoza kunena kuti N'zosatheka. Ndiye funso ndi lakuti: "N'chifukwa chiyani tiyenera zonsezi ntchito chete, ngati iwo kupereka gibberish zovuta kuzimvetsa, amene sangathe kuwerenga?". Izi m'nkhani ino.

Kodi chete ntchito, nanga umagwira ntchito motani?

ntchito lakonzedwa kuti atembenuke deta ukubwera amangosankha lalikulu kuchuluka chifukwa cha kutalika lokhazikika. The ndondomeko kwambiri umenewu kusintha amatchedwa hashing, ndi chifukwa - ndi chete kapena chete code. Nthawi zina ngakhale ntchito mawu akuti "zala" kapena "uthenga Digest", komabe ali n'kukhala kwambiri. Pali ambiri ma aligorivimu pankhani ya mmene kusanduliza gulu lazidziwitso aliyense mu ndondomeko zina za zizindikiro za kutalika ena. The aligorivimu Ambiri ntchito otchedwa md5, amene anayamba kupanga mwamsanga 1991. Ngakhale pakali pano, md5 pang'ono ndi lothandiza ntchito ali osavomerezeka, komabe akadali padziko, ndipo nthawi zambiri mmalo mwa "chete kachidindo" pa malo chabe kulemba md5, ndipo amasonyeza malamulo lokha.

N'chifukwa chiyani tiyenera chete ntchito?

Kudziwa chifukwa, N'zosatheka kudziwa deta pachiyambi, koma yemweyo deta ukubwera kupereka zotsatira chomwecho. Choncho, hasi ntchito (amatchedwanso ndi convolution ntchito) amagwiritsidwa ntchito kusunga zinthu zanu zachinsinsi kwambiri monga achinsinsi, lolowera, chiwerengero ID ndi zina zambiri zanu. M'malo kuyerekezera nkhani analowa ndi wosuta, ndi anthu kusungidwa mu Nawonso achichepere, pali tikayerekezera hashes. Izi zipangitsa kuti vuto la kutayikira mwangozi zambiri, palibe munthu tingalandire Deta zofunika pa zofuna zawo. Amayerekezera chete malamulo ndi yabwino onani kulondola kwa otsitsira owona pa Intaneti, makamaka ngati kulankhulana kusokonezeka zinachitika pa download.

Hasabineya: kodi iwo ali T

Malinga mukupita chete ntchito ndi imodzi mwa mitundu itatu:

1. Chithunzichi kuonanso kukhulupirika mfundo

Pamene deta kufala network pali mawerengedwe a paketi chete, ndi chifukwa chimenechi opatsirana pamodzi ndi wapamwamba. Pamene analandira kachiwiri yopangidwa chete malamulo ndi poyerekeza ndi mtengo akamagwira maukonde. Ngati malamulo sakugwirizana, izo zikusonyeza kulakwitsa, ndi phukusi kuonongeka adzakhala anasamutsa mwatsopano. Mu chotero mawerengedwe ntchito mofulumira liwiro koma ochepa mfundo chete ndi kukhazikika osauka. Chitsanzo cha mtundu: CRC32 lomwe lili 232 okha mfundo zosiyana.

2. Ntchito cryptographic

Mtundu ntchito kuchilango mwayi wosaloleka (na-). Iwo amakulolani aone ngati pali deta ziphuphu chifukwa cha LP pa kulanda owona pa maukonde. chete woona alipo poyera, mu nkhani iyi, ngati analandira file chete akhoza yopangidwa ntchito kuchuluka mapulogalamu osiyanasiyana. ziwalo moyo wautali ndi ntchito khola, ndi kufunafuna mwansanga (machesi zotheka zotsatira pazimene osiyana gwero) ndi yovuta kwambiri. kugwira ntchito ntchito yosungirako mu achinsinsi Nawonso achichepere (SH1, SH2, MD5), ndi zina zambiri zamtengo wapatali.

3. Ntchito ya lakonzedwa kuti alenge deta imayenera kapangidwe

cholinga chake ndi m'malo gulu yaying'ono mwadongosolo. zambiri mu dongosolo wapadera wotchedwa tebulo chete. tebulo Zimenezi zimathandiza kuwonjezera zatsopano, kuchotsa mfundo ndi kufufuza deta chofunika imathamanga kwambiri.