Isibali sekhodi sehashi SHA3-256

I-SHA3-256 (i-Secure Hash Algorithm 3 256-bit) ngumsebenzi we-hash we-cryptographic othatha okokufaka (noma umyalezo) futhi ukhiqiza ukukhishwa kwe-fixed-size, i-256-bit (32-byte), evame ukumelwa njengenombolo ye-hexadecimal yezinhlamvu ze-64.

I-SHA-3 ilungu lakamuva lomndeni we-Secure Hash Algorithm (SHA), okhishwe ngokusemthethweni ngo-2015. Ngokungafani ne-SHA-1 ne-SHA-2, esekelwe ezakhiweni ezifanayo zezibalo, i-SHA-3 yakhiwe kumklamo ohluke ngokuphelele obizwa ngokuthi i-keccak algorithm. Akudalwanga ngoba i-SHA-2 ayiphephile; I-SHA-2 isabhekwa njengephephile, kodwa i-SHA-3 inezela ungqimba olwengeziwe lokuphepha ngomklamo ohlukile, uma nje ubuthakathaka besikhathi esizayo butholakala ku-SHA-2.

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-SHA3-256 Hash Algorithm

Angiyena isazi sezibalo noma i-cryptographer, ngakho-ke ngizozama ukuchaza lo msebenzi we-hash ngendlela yokuthi abanye bami abangewona izibalo bangaqonda. Uma ukhetha incazelo yezibalo eqondile ngokwesayensi, egcwele esikhundleni salokho, ungayithola kwabaningi kumawebhusayithi ;-)

Nakanjani, ngokungafani nemindeni yangaphambilini ye-SHA (i-SHA-1 ne-SHA-2), engabhekwa njengefana ne-blender, i-SHA-3 isebenza kakhulu njengesiponji.

Inqubo yokubala i-hash ngale ndlela ingaphulwa izinyathelo ezintathu ezisezingeni eliphezulu:

Isinyathelo 1 - Isigaba Sokumunca

• Cabanga uthele amanzi (idatha yakho) kwisiponji. Isiponji sibamba amanzi kancane kancane.
• Ku-SHA-3, idatha yokufaka iphulwa ibe yizicucu ezincane futhi ifakwe "isiponji" sangaphakathi (i-bit array enkulu).

Isinyathelo 2 - Ukuxuba (Ukuguqulwa)

• Ngemuva kokumunca idatha, i-SHA-3 icindezela futhi ijike isiponji ngaphakathi, ixube konke okuzungezile ngamaphethini ayinkimbinkimbi. Lokhu kuqinisekisa ukuthi ngisho noshintsho oluncane lokufaka luphumela ku-hash ehluke ngokuphelele.

Isinyathelo 3 - Isigaba Sokucindezela

• Ekugcineni, ucindezela isiponji ukukhulula okukhiphayo (i-hash). Uma udinga i-hash ende, ungaqhubeka nokucindezela ukuze uthole okukhiphayo okuningi.

Ngenkathi isizukulwane se-SHA-2 semisebenzi ye-hash sisabhekwa njengephephile (ngokungafani ne-SHA-1, okungafanele isetshenziselwe ukuphepha futhi), kungaba nomqondo ukuqala ukusebenzisa isizukulwane se-SHA-3 esikhundleni lapho kuklanywa izinhlelo ezintsha, ngaphandle kokuthi zidinga ukuhambisana emuva nezinhlelo zefa ezingasekeli.

Enye into okufanele uyicabangele ukuthi isizukulwane se-SHA-2 cishe umsebenzi we-hash osetshenziswa kakhulu futhi ohlaselwe kakhulu (ikakhulukazi i-SHA-256 ngenxa yokusetshenziswa kwayo ku-Bitcoin blockchain), nokho isabambe. Kuzothatha isikhashana ngaphambi kokuba i-SHA-3 ime ekuhlolweni okufanayo okunzima ngezigidigidi.