Isibali sekhodi sehashi SHA-256

I-SHA-256 (i-Secure Hash Algorithm 256-bit) ngumsebenzi we-hash we-cryptographic othatha okokufaka (noma umyalezo) futhi ukhiqiza usayizi ongaguquki, i-256-bit (32-byte) okukhiphayo, okuvame ukumelwa njengenombolo ye-hexadecimal yezinhlamvu ezingama-64. Kungokwalabo umndeni we-SHA-2 wemisebenzi ye-hash, eklanyelwe yi-NSA futhi esetshenziswa kabanzi ezinhlelweni zokuphepha ezifana namasiginesha edijithali, izitifiketi, nobuchwepheshe be-blockchain, mhlawumbe edume kakhulu njenge-algorithm ye-hash esetshenziselwa ukuvikela i-Bitcoin cryptocurrency.

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-SHA-256 Hash Algorithm

Angiyena omuhle kakhulu ezibalweni futhi angizicabangi neze njengesazi sezibalo, ngakho-ke ngizozama ukuchaza lo msebenzi we-hash ngendlela ozakwethu abangewona izibalo abangayiqonda. Uma ukhetha inguqulo yezibalo elungile ngokwesayensi, ngiyaqiniseka ukuthi ungakuthola kwamanye amawebhusayithi amaningi ;-)

Noma kunjalo, ake sicabange ukuthi umsebenzi we-hash uyi-blender ephezulu kakhulu eyenzelwe ukudala i-smoothie eyingqayizivele kusuka kunoma yiziphi izithako ozifaka kuwo. Lokhu kuthatha izinyathelo ezintathu:

Isinyathelo 1: Faka izithako (ukufaka)

• Cabanga ngokufaka njenganoma yini ofuna ukuyihlanganisa: ubhanana, ama-strawberries, izingcezu ze-pizza, noma ngisho nencwadi yonke. Akunandaba ukuthi yini oyifakayo, inkulu noma incane, elula noma eyinkimbinkimbi.

Isinyathelo 2: Inqubo yokuxuba (umsebenzi we-hash)

• Ucindezela inkinobho, futhi i-blender iyasendle - ukusika, ukuxuba, ukujikeleza ngesivinini esihlanyayo. Iqukethe iresiphi ekhethekile ngaphakathi okungekho muntu ongayishintsha.
• Le iresiphi ifaka imithetho ehlanyayo efana nale: "Spin kwesokunxele, jikeleza ngakwesokudla, uphendule phansi, nyakazise, usike ngezindlela ezingavamile." Konke lokhu kwenzeka ngemuva kwezigcawu.

Isinyathelo 3: Thola i-Smoothie (ukukhipha):

• Akunandaba ukuthi yiziphi izithako ozisebenzisile, i-blender ihlala ikunikeza inkomishi eyodwa ye-smoothie (lokho kungusayizi ongaguquguquki wamabhithi angama-256 ku-SHA-256).
• I-smoothie inokunambitheka okuyingqayizivele nombala ngokuya ngezithako ozifakayo. Noma ngabe ushintsha into eyodwa encane - njengokungeza uhlamvu olulodwa lukashukela - i-smoothie izonambitheka ngokuphelele.

Ngokungafani nemisebenzi eminingi emidala ye-hash, i-SHA-256 isabhekwa njengephephile kakhulu. Ngaphandle kokuthi nginesizathu esithile sokusebenzisa enye i-algorithm, i-SHA-256 yiyona engivame ukuya kuyo nganoma iyiphi injongo, noma ngabe ihlobene nokuphepha noma cha.

Njengoba kushiwo ngaphambili, angiyena isazi sezibalo noma i-cryptographer, ngakho-ke angikwazi ukungena ku-cryptanalysis rant enkulu yokuthi kungani i-SHA-256 iphephile kakhulu, noma ingcono noma imbi kakhulu, kuneminye imisebenzi ye-hash ye-cryptographic nayo ebhekwa njengephephile. Kodwa-ke, ngenxa yezimo ezingahlobene nobuchwepheshe ne-algorithm, i-SHA-256 inento eyodwa ehamba ngayo abanye abangenayo: ukusetshenziswa kwayo njengomsebenzi wokusayina i-hash ku-blockchain yeBitcoin.

Lapho ama-algorithms amadala e-hash afakazelwe ukuthi angaphephile, kungenxa yokuthi abanye abantu babeke isikhathi nomzamo wokuwahlaziya ngomzamo wokuthola ubuthakathaka. Kungase kube nezizathu eziningi zalokhu; mhlawumbe intshisekelo yesayensi eqotho, mhlawumbe ukuzama ukuqhekeza uhlelo, mhlawumbe okunye.

Yebo, ukuphula i-SHA-256 ngendlela ezokwenza ingaphephile kungasho ukuphula inethiwekhi ye-Bitcoin evulekile futhi ngokuyisisekelo ikunikeze ukufinyelela ukuze ubambe wonke ama-Bitcoins owafunayo. Ngesikhathi sokubhala, inani eliphelele lawo wonke ama-Bitcoins lingaphezu kwama-2,000 billion USD (lokho kungaphezu kuka-2,000,000,000,000 USD). Lokho kungaba yisisusa esikhulu kakhulu sokuzama ukuphula le algorithm, ngakho-ke nginesiqiniseko sokuthi amanye ama-algorithms ambalwa (uma ekhona) ahlaziywe futhi azame ukuphazamiseka njenge-SHA-256 ngabantu abaningi abahlakaniphile, nokho isabambe.

Yingakho nginamathela kulokho ngaphezu kwezindlela, kuze kube yilapho kufakazelwa ukuthi akulungile.

Ukufunda Okuqhubekayo

Uma ukujabulele lokhu okuthunyelwe, ungaphinda uthande lezi ziphakamiso:

• Isibali sekhodi sehashi Whirlpool
• Isibali sekhodi sehashi RIPEMD-320
• MD4 Hash Ikhodi Calculator