HAVAL-224/3 Kalkuleta na Lambar Hash

HAVAL (Hash of Variable Length) shine aikin hash na sirri wanda Yuliang Zheng, Josef Pieprzyk, da Jennifer Seberry suka tsara a cikin 1992. Yana da tsawo na iyalin MD (Message Digest), musamman wahayi daga MD5, amma tare da gagarumin cigaba a sassauci da tsaro. Yana iya samar da lambobin hash masu tsayi masu tsayi daga 128 zuwa 256 bits, sarrafa bayanai a cikin 3, 4 ko 5.

Bambancin da aka gabatar akan wannan shafin yana fitar da lambar zanta mai lamba 224 (28 byte) wanda aka ƙididdige shi cikin zagaye 3. An fitar da sakamakon a matsayin lamba 56 hexadecimal.

Cikakken bayyanawa: Ban rubuta takamaiman aiwatar da aikin hash da aka yi amfani da shi akan wannan shafin ba. Daidaitaccen aiki ne wanda aka haɗa tare da yaren shirye-shiryen PHP. Na yi mahaɗin yanar gizo ne kawai don sanya shi a fili a nan don dacewa.

Game da HAVAL Hash Algorithm

Ka yi tunanin HAVAL a matsayin babban mai ƙarfi wanda aka ƙera don haɗa kayan abinci (bayanan ku) sosai ta yadda babu wanda zai iya gano ainihin girke-girke kawai ta kallon smoothie na ƙarshe (zata).

Mataki na 1: Shirya Sinadaran (Bayanai naku)

Lokacin da ka ba HAVAL wasu bayanai - kamar saƙo, kalmar sirri, ko fayil - ba wai kawai jefa su cikin blender kamar yadda yake ba. Na farko, shi:

• Yana tsaftacewa da yanke bayanan cikin tsaftataccen yanki (wannan ake kira padding).
• Tabbatar cewa jimlar girman ya dace da blender daidai (kamar tabbatar da abubuwan da suka dace sun cika kwalban daidai).

Mataki na 2: Haɗawa cikin Zagaye (Haɗin Ƙirar)

HAVAL ba kawai danna "blend" sau ɗaya kawai ba. Yana haxa bayanan ku ta hanyar zagaye 3, 4, ko 5 - kamar haɗawa da smoothie ɗinku sau da yawa don tabbatar da cewa kowane guntu ya ɓarke.

• 3 wucewa: Haɗin sauri (sauri amma ba amintacce ba).
• 5 wucewa: Babban gauraya sosai (hankali amma mafi aminci).

Kowane zagaye yana haɗa bayanai daban-daban, ta amfani da "blades" na musamman (ayyukan lissafi) waɗanda ke sara, juyewa, motsawa, da murɗa bayanan cikin hauka, hanyoyin da ba za a iya faɗi ba.

Mataki 3: Sirrin miya (Aikin matsawa)

Tsakanin zagaye zagaye, HAVAL yana ƙara miya ta sirri - girke-girke na musamman waɗanda ke tayar da abubuwa har ma. Wannan matakin yana tabbatar da cewa ko da ɗan ƙaramin canji a cikin bayananku (kamar canza harafi ɗaya a cikin kalmar sirri) ya sa smoothie ɗin ƙarshe ya bambanta.

Mataki na 4: Ƙarshen Smoothie (The Hash)

Bayan duk haɗuwa, HAVAL yana fitar da "smoothie" na ƙarshe.

• Wannan shi ne zanta - hoton yatsa na musamman na bayanan ku.
• Komai girman ko ƙanƙantar bayananku na asali, hash koyaushe girman iri ɗaya ne. Yana kama da saka kowane girman 'ya'yan itace a cikin blender amma koyaushe yana samun kofi iri ɗaya na smoothie.

Tun daga 2025, kawai HAVAL-256/5 har yanzu ana ganin amintacce don dalilai na sirri, kodayake bai kamata ku yi amfani da shi lokacin zana sabbin tsarin ba. Idan har yanzu kuna amfani da shi a cikin tsarin gado ba ku cikin kowane haɗari nan da nan, amma la'akari da ƙaura zuwa misali SHA3-256 a cikin dogon lokaci.