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 ohleliwe, ukukhishwa kwe-256-bit (32-byte), okuvame ukumelwa njengenombolo ye-hexadecimal yezinhlamvu ze-64. Kungokwalabo umndeni SHA-2 imisebenzi hash, yakhelwe NSA futhi kabanzi izicelo zokuphepha like amasignesha digital, izitifiketi, futhi ubuchwepheshe blockchain, cishe edume kakhulu njengoba algorithm hash esetshenziswa ukuvikela cryptocurrency Bitcoin.

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

Angilungile ngokukhethekile kwizibalo futhi angizithathi neze njengesazi sezibalo, ngakho-ke ngizozama ukuchaza lo msebenzi we-hash ngendlela yokuthi abanye bami abangewona izazi zezibalo bangaqonda. Uma ukhetha i-math-version efanele ngokwesayensi, ngiyaqiniseka ukuthi ungathola lokho kwamanye amawebhusayithi amaningi ;-)

Nakanjani, ake sicabange ukuthi umsebenzi we-hash uyi-super high-tech blender eyenzelwe ukudala i-smoothie eyingqayizivele kunoma yiziphi izithako ozifaka kuyo. Lokhu kuthatha izinyathelo ezintathu:

Isinyathelo 1: Faka Izithako (Ukufaka)

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

Isinyathelo 2: Inqubo Yokuxuba (Umsebenzi we-Hash)

• Ucindezela inkinobho, futhi blender uya zasendle - ukusika, ukuxuba, ukuphotha ngesivinini crazy. It has a iresiphi ekhethekile ngaphakathi ukuthi akekho ongashintsha.
• Leresiphi kuhlanganisa imithetho crazy like: "Spin kwesokunxele, spin kwesokudla, flip ebheke phansi, shake, chop ngezindlela ezingavamile." Konke lokhu kwenzeka ngemuva.

Isinyathelo 3: Uthola i-Smoothie (Okukhiphayo):

• Kungakhathaliseki ukuthi yiziphi izithako ozisebenzise, i-blender ihlala ikunika ncamashi inkomishi eyodwa ye-smoothie (lokho usayizi ohleliwe we-256 bits ku-SHA-256).
• I-smoothie inokunambitheka okuyingqayizivele nombala ngokusekelwe kwizithako ozifakayo. Ngisho noma ushintsha nje into eyodwa encane - njengokungeza okusanhlamvu okukodwa koshukela - i-smoothie izonambitheka ihluke ngokuphelele.

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

Njengoba kushiwo ngaphambili, angiyena isazi sezibalo noma i-cryptographer, ngakho-ke angikwazi ukungena ku-cryptanalysis rant enkulu mayelana nokuthi kungani i-SHA-256 iphephile kakhulu noma ingaphansi, noma ingcono noma imbi kakhulu, kuneminye imisebenzi ye-hash ye-cryptographic nayo ebhekwa njengephephile. Kodwa-ke, ngenxa yezimo ezingahlobene ngempela ngobuchwepheshe ne-algorithm, i-SHA-256 inento eyodwa eya kuyo ukuthi abanye abanalo: ukusetshenziswa kwayo njengomsebenzi we-hash wokusayina ku-Bitcoin blockchain.

Lapho ama-algorithms amadala we-hash efakazelwe ukuthi awaphephile, kungenxa kuphela yokuthi abanye abantu bafake isikhathi nomzamo wokuwahlaziya emzamweni wokuthola ubuthakathaka. Kungaba nezinhloso eziningi zalokhu; mhlawumbe isithakazelo sesayensi esiqotho, mhlawumbe uzama ukuqhekeza uhlelo, mhlawumbe okunye.

Kulungile, ukuphula i-SHA-256 ngendlela enganikeza ukuthi ingaphephile kungasho ukuphula inethiwekhi ye-Bitcoin evulekile futhi ngokomthetho ikunikeza ukufinyelela ukubamba wonke ama-Bitcoins oyifunayo. Ngesikhathi sokubhala, inani eliphelele lawo wonke ama-Bitcoins lingaphezu kwe-2,000 billion USD (lokho kungaphezu kwe-2,000,000,000,000 USD). Lokho kungaba umgqugquzeli omuhle kakhulu ukuzama ukuphula le algorithm, ngakho-ke nginesiqiniseko sokuthi ambalwa (uma ekhona) amanye ama-algorithms ahlaziywe futhi azama ukuphazamiseka kakhulu njenge-SHA-256 ngabantu abaningi abahlakaniphile, nokho isabambe.

Futhi yingakho nginamathela kulokho phezu kwezinye izindlela, kuze kube yilapho kufakazelwa ukuthi akulungile.