Ihlola hashi tibalo: kuyini?

Abantu abaningi abasebenzisa ikhompyutha ngokuhamba kwesikhathi, ku-amaziyo eduze, ibuza hashi-tibalo. Zibizwa ngokuthi ama-checksum. Kuyini lokhu? Okudingayo? ibalwa kanjani le mali efanayo?

definition

Checksum kuthiwa inani elithile, ebalwa ngedatha esebenzisa ubuchule obuphezulu ekhethekile. Injongo hashi tibalo - kuhlolwa ubuqotho idatha ngesikhathi sokudlulisa. I-algorithm ezivamile ekubaleni - MD5, CRC32 futhi i-SHA-1. Checksums lungasetshenziswa ukuqhathanisa amasethi idatha non-kwefrakshini, njengoba kufanele, ngenxa ukuthola amagciwane kwikhompyutha yakho.

Ukuthandwa ukusetshenziswa le ndlela sivela yokuthi isivivinyo kulula ukusebenza imishini digital, ukusebenza kanambambili simiso ukubala. It ihlaziya ngaphandle inkinga futhi mkhulu kakhulu lokuthola amaphutha ezibangwa khona umsindo ezindleleni idatha.

Algorithms sokuhlola

I-algorithm MD5 alisetshenziswa kuphela ukuqinisekisa ubuqotho idatha, kodwa futhi kunikeza ithuba uthole isihlonzi sasivumela okuthembekile, elivame ukusetshenziswa ezimweni lapho okufanayo zitholakala kwi-amafayela kwikhompyutha. Ngakho, lokhu akunakuqhathaniswa okuqukethwe, ne-hash yabo tibalo.

CRC32 algorithm isetshenziswa izinhlelo yomlando. Limi njengomthombo "ikhodi komsebenzi eyindilinga".

I-SHA-1 algorithm ithole isicelo sokuqinisekisa ukuhlonishwa kwemininingwane zazo egcwele esebenzisa uhlelo BitTorrent.

Ngokwesibonelo

Ngokwesibonelo, umsebenzisi ufuna ukufaka uhlelo lokusebenza noma umdlalo ku-PC yakho. Ulanda isithombe futhi ufuna ukuqiniseka ukuthi ubuqotho ifayela ukuze kanye lutho ukudluliswa kulahleka. Indlela elula yokwenza lokhu - sokuqhathanisa hashi ifayela elandiwe, kanye namanani enikeziwe ngumlobi. Uma luqondane, isithombe ayiqukethe amaphutha. Nokho, uma hashi isamba amafayela ezahlukene, kubalulekile ukumpompa futhi, ngoba kwakukhona ukuhluleka.

Le nqubo aphansi isilinganiso zokuvimbela ngokumelene umsebenzi ulenga ayilungile. Running ke, ungaqiniseka ukuthi ukufakwa kwe-ezisebenza uhlelo, izinhlelo noma imidlalo kuyoba lesifanele.

Lokhu okulandelayo kuzonisiza ukuchaza Umbuso abhekana ngayo ukubala futhi ukuqinisekiswa checksums.

Uhlelo HashTab: hlola hashi isamba

Le Umbuso indawo kuyinto plugin ukuthi luhlanganisa ohlelweni lokusebenza futhi lisetshenziswa esenkingeni. It ingalandwa kusukela website esemthethweni ngokuphelele mahhala ngesimo ifayela ukufakwa. Ukufaka uhlelo enembile kakhulu.

Ngemva kokubekela izakhiwo ifayela ngalinye uyodala ithebhu entsha eyengeziwe ukubala checksum. Ngokuzenzakalelayo, bona zizawubalwa ubuchule ezintathu kakhulu echazwe ngenhla.

Indlela hlola hashi isamba? Ukuze wenze lokhu "Qhathanisa" ensimini ukufaka inani eliboniswe ngumlobi. Uma ifayela elandiwe ihlolwe ngempumelelo ukuze athole ukuthi ligunyaziwe, umaki wokuhlola oluhlaza. Kungenjalo, umsebenzisi uzobona esibomvu. Kulokhu, kutuswa ukulanda ifayela futhi.

Amasethingi kwi "amafayela hashi sum" ithebhu ungakwazi ukushintsha uma uchofoza into efanele. Vula Izinketho iwindi, lapho kungenzeka ukusetha oyifunayo isibonisi checksums ukuqinisekisa kanye nokuhlola. Ukuze konke ecacile, kutuswa ukuba uphawu lokumaka elikuvumela ukuba ubonise checksums ezincane.

Ngakho, umsebenzi kulula kakhulu kulolu hlelo. Njengoba kungenza ngisho abasebenzisi abangenalwazi baqonde.

MD5 Ifayela Checker Uhlelo

Le Umbuso indawo ibuye kulayishiwe kusuka indawo esemthethweni, kodwa ayidingi ukufakwa. Tsine lesifanele kukwenta nje uyisebenzise. Isebenzisa igama elifanayo ngoba algorithm yokuqinisekisa. Lapho ukulanda ifayela ufuna ukukopisha ebhodini lokunamathisela hashi isamba sokuqala bese uyifaka emkhakheni yokuqinisekisa. Isinyathelo esilandelayo - khetha ifayela ukuthi umsebenzisi ufisa ukuhlola ubuqotho. Ngemva ngokuchofoza inkinobho "Hlola" uzothola umyalezo nge umphumela lapho uzotshelwa ngabe checksum wefayela noma ifayela lilimele futhi akukho umdlalo umdlalo.

A kungenzeka okuqhubekayo ukubala Umbuso le MD5 isamba noma yiliphi ifayela kukhompyutha yakho.

isiphetho

Ngakho, kwakubhekwa njengento igama elithi "checksum". Kwacaca ukuthi kungani isetshenziswa. Ukuze umsebenzisi isilinganiso lena inketho lula ukuhlola ifayela ubuqotho nokulandela original. Izinsiza ewusizo achazelwe kubalwa nokumadanisa tibalo hashi. Eyokuqala uyakwazi uqhathanise amanani angalingani, kanti eyesibili algorithm eyodwa kuphela, kodwa ayidingi ukufakwa, okuyinto ebalulekile engekho amalungelo nomqondisi.

Uma uya ukufaka uhlelo lokusebenza noma omunye umkhiqizo isofthiwe, qiniseka ukuthi uhlole Kunconywa hashi tibalo emva ukulanda wonke amafayela ukufakwa. Lokhu kuyokwenza ugcine isikhathi esiningi futhi, okubaluleke kakhulu, imizwa.