Umphambili Wekhodi ye-HASH MD2

Umsebenzi we-hash we-MD2 (Message Digest 2) uwumsebenzi we-hash we-cryptographic owaklanywa nguRonald Rivest ngo-1989. Walungiselelwa ngqo amakhompyutha angu-8-bit. Nakuba manje ubhekwa njengongasebenzi futhi ongavikelekile ngezinjongo ze-cryptographic, ufakiwe lapha uma kwenzeka umuntu edinga ukubala ikhodi ye-hash ehambisana ne-backwards. Akufanele isetshenziswe lapho kuklanywa izinhlelo ezintsha.

Ukudalulwa okuphelele: Angibhalanga ukusetshenziswa okuqondile komsebenzi we-hashi osetshenziswe kuleli khasi. Kungumsebenzi ojwayelekile ofakwe nolimi lokuhlela lwe-PHP. Ngenze isixhumi esibonakalayo sewebhu kuphela ukuze ngisenze sitholakale esidlangalaleni lapha ukuze kube lula.

Mayelana ne-MD2 Hash Algorithm

Ngilungile ezibalweni ezilula, kodwa angilungile kakhulu futhi angizibheki njengososayensi wezibalo, ngakho-ke ngizozama ukuchaza ukuthi lo msebenzi we-hash usebenza kanjani ngendlela abangebona ochwepheshe bezibalo abangayiqonda. Uma ukhetha inguqulo yezibalo egcwele, kulula ukuyithola kwezinye izindawo eziningi ku-inthanethi ;-)

Manje, ake sithi uneresiphi ethatha noma yiziphi izithako (umyalezo wakho) bese ihlala iziguqula zibe yibha eyodwa encane, enezingcezu ezingu-16 zetshokolethi (i-hash). Kungakhathaliseki ukuthi izithako zakho ziyini noma zinkulu noma zincane kangakanani, uzohlala uthola ibha yetshokolethi efanayo ngobukhulu.

Umgomo wale recipe ukuthi:

1. Awukwazi ukuqagela izithako ngokubheka ushokoledi kuphela.
2. Ngisho noshintsho oluncane ezithakweni lwenza ukunambitheka kwetshokolethi kuhluke ngokuphelele, ngakho-ke uyazi ukuthi othile udlale ngezithako noma iresiphi.

Ukudala ibha yetshokolethi kuyinqubo enezinyathelo ezintathu:

Isinyathelo 1: Ukugcwalisa Umlayezo (Ukwenza Izithako Zilingane)

Ake sithi unebhasikidi eliphethe ama-apula angu-16 (noma izithako). Kodwa kuthiwani uma unama-apula angu-14 kuphela? Kungadingeka wengeze amanye amabili ukuze ugcwalise ibhasikidi. Uma umfushane, umane wengeze ama-apula engeziwe. Isibonelo:

• Uma udinga amanye amabili, ufaka ama-apula amabili.
• Uma unezingaphezu kuka-16, udinga ukugcwalisa i-basket elandelayo. Isibonelo, uma unezingu-28, ungeza ezine ukuze ufike ku-32 (kabili u-16).

Lokhu kuqinisekisa ukuthi yonke ibhasikidi igcwele ngaphambi kokuba siqhubekele esinyathelweni esilandelayo.

Isinyathelo 2: Ukwengeza i-Checksum (Uhlu Lwezithako Eziyimfihlo)

Manje, sakha uhlu lwezithako oluyimfihlo olusekelwe kukho konke okusebhasikidini.

• Ubheka ama-apula, bese ubhala ikhodi eyimfihlo yalelo nalelo.
• Lokhu akusikho nje ikhophi - kufana nokuhlanganisa izinombolo ngendlela exakile ukuze noma umuntu engena ngokunyenya ashintshe i-apula, uhlu luzobonakala lungalungile.

Lolu hlu lukusiza ukuthi uhlole kabusha ukuthi izithako azizange ziphazanyiswe yini kamuva.

Isinyathelo 3: Ukuhlanganisa Konke Kanyekanye (I-Magic Blender)

Manje sekuza ingxenye ejabulisayo - ukuxuba!

• Une-blender ye-slot engu-48.
• Ufaka: Ama-apula (umyalezo wakho). Ingxube endala yangaphambilini (iqala ingenalutho kuqoqo lokuqala). Ingxube yezinto ezimbili zokuqala.

Bese uyayixuba. Kodwa hhayi kanye nje. Uyixuba izikhathi ezingu-18, ushintsha ijubane kanye nendlela umjikelezo ngamunye. Lokhu akuyona ukuxuba okuvamile - umjikelezo ngamunye uxuba ingxube ngendlela ekhethekile ukuze ngisho ne-apula elilodwa elihlukile lenze ushokoledi wonke unambitheke ngendlela ehlukile.

Ibha Yokugcina Yeshokoledi (I-Hash)

Ngemva kwakho konke lokho kuxuba, uthela izingcezu ezingu-16 eziphezulu zengxube. Leyo yi-chocolate bar yakho yokugcina - i-MD2 hash. Ayibukeki njenge-apula yokuqala, futhi uma uzama ukuqagela izithako zokuqala kusuka ku-chocolate kuphela, ubungeke ukwazi.

Khumbula:

• Izithako ezifanayo = ushokoledi ofanayo.
• Shintsha ngisho ne-apula elilodwa = ushokoledi ohluke ngokuphelele.
• Awukwazi ukubuyela emuva - awukwazi ukuthola ama-apula okuqala ngoshokoledi kuphela.

Ukufunda Okuqhubekayo

Uma ukujabulele lokhu okuthunyelwe, ungaphinda uthande lezi ziphakamiso:

• Isibali sekhodi sehashi XXH-32
• Isibali sekhodi sehashi SHA3-384
• Isibali sekhodi sehashi HAVAL-128/4