{"id":55092,"date":"2020-01-12T00:00:00","date_gmt":"2020-01-11T21:00:00","guid":{"rendered":"https:\/\/prohoster.info\/blog\/blog_prohoster\/dostupna-kriptograficheskaya-hesh-funktsiya-blake3-kotoraya-v-10-raz-bystree-sha-2"},"modified":"2020-02-18T14:03:10","modified_gmt":"2020-02-18T11:03:10","slug":"dostupna-kriptograficheskaya-hesh-funktsiya-blake3-kotoraya-v-10-raz-bystree-sha-2","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sq\/blog\/news\/dostupna-kriptograficheskaya-hesh-funktsiya-blake3-kotoraya-v-10-raz-bystree-sha-2","title":{"rendered":"Disponohet funksioni hash kriptografik BLAKE3, q\u00eb \u00ebsht\u00eb 10 her\u00eb m\u00eb i shpejt\u00eb se SHA-2","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Implementimi p\u00ebrfundimtar i algoritmit \u00ebsht\u00eb publikuar BLAKE3<\/a><\/noindex>, i cili ofron nj\u00eb funksion hesh t\u00eb kriptografis\u00eb t\u00eb dizajnuar p\u00ebr aplikime t\u00eb tilla si verifikimi i integritetit t\u00eb skedar\u00ebve, autentikimi i mesazheve dhe formimi i t\u00eb dh\u00ebnave p\u00ebr n\u00ebnshkrime digjitale. BLAKE3 nuk \u00ebsht\u00eb e destinuar p\u00ebr heshimin e fjal\u00ebkalimeve (p\u00ebr fjal\u00ebkalime duhet t\u00eb p\u00ebrdoren yescrypt, bcrypt, scrypt ose Argon2), pasi fokusimi \u00ebsht\u00eb n\u00eb llogaritjen sa m\u00eb t\u00eb shpejt\u00eb t\u00eb heshave me garantimin e munges\u00ebs s\u00eb kolizionit, mbrojtje nga gjetja e pre-image<\/a><\/noindex> dhe nuk \u00ebsht\u00eb e ndjeshme ndaj madh\u00ebsis\u00eb s\u00eb t\u00eb dh\u00ebnave q\u00eb hetohen. Implementimi standard i BLAKE3 u publikua<\/a><\/noindex> n\u00eb kuad\u00ebr t\u00eb nj\u00eb license t\u00eb dyfisht\u00eb \u2014 pron\u00eb e zakonshme (CC0) dhe Apache 2.0.<\/p>\n

Dallimi kryesor i funksionit t\u00eb ri hash \u00ebsht\u00eb performanca shum\u00eb e lart\u00eb e llogaritjes s\u00eb hash-it nd\u00ebrsa ruan besueshm\u00ebrin\u00eb n\u00eb nivelin e SHA-3. Sip\u00ebrfaqja e rezultateve t\u00eb hash-it n\u00eb BLAKE3 \u00ebsht\u00eb 32 byte (256 bit) si parazgjedhje, por mund t\u00eb zgjerohet deri n\u00eb vlera t\u00eb rast\u00ebsishme. N\u00eb testin p\u00ebr gjenerimin e hash-it p\u00ebr nj\u00eb skedar me madh\u00ebsi 16 KB, BLAKE3 tejkalon SHA3-256 me 15 her\u00eb, SHA-256 me 12 her\u00eb, SHA-512 me 8 her\u00eb, SHA-1 me 6 her\u00eb, dhe BLAKE2b me 4 her\u00eb. Nj\u00eb ndarje e r\u00ebnd\u00ebsishme ruhet edhe kur p\u00ebrpunohen sasi shum\u00eb t\u00eb m\u00ebdha t\u00eb t\u00eb dh\u00ebnave, p\u00ebr shembull, BLAKE3 rezultoi m\u00eb t\u00eb shpejta<\/a><\/noindex> SHA-256 me 8 her\u00eb n\u00eb llogaritjen e heshit p\u00ebr 1GB t\u00eb dh\u00ebnash t\u00eb rast\u00ebsishme.<\/p>\n

\"Disponohet<\/a><\/noindex><\/center><\/p>\n

Algoritmi \u00ebsht\u00eb zhvilluar nga specialist\u00eb t\u00eb njohur t\u00eb kriptografis\u00eb (Jack O’Connor<\/a><\/noindex>, Jean-Philippe Aumasson<\/a><\/noindex>, Samuel Neves<\/a><\/noindex>, Zooko Wilcox-O’Hearn<\/a><\/noindex>) dhe vazhdon zhvillimin e algoritmit BLAKE2<\/a><\/noindex> dhe p\u00ebrdor p\u00ebr kodimin e pem\u00ebs s\u00eb zinxhir\u00ebve t\u00eb bllokimeve mekanizmin Bao<\/a><\/noindex>. Ndryshe nga BLAKE2 (BLAKE2b, BLAKE2s), p\u00ebr BLAKE3 ofrohet nj\u00eb algorit\u00ebm unifikues p\u00ebr t\u00eb gjitha platforma, i cili nuk \u00ebsht\u00eb i lidhur me p\u00ebrmas\u00ebn dhe madh\u00ebsin\u00eb e heshit. <\/p>\n

Rritja e performanc\u00ebs \u00ebsht\u00eb arritur fal\u00eb reduktimit t\u00eb numrit t\u00eb raundeve nga 10 n\u00eb 7 dhe heshimit t\u00eb ve\u00e7ant\u00eb t\u00eb blloqeve n\u00eb copa prej 1 KB. Sipas krijuesve, ata kan\u00eb gjetur nj\u00eb prov\u00eb t\u00eb bindshme prov\u00eb<\/a><\/noindex>, q\u00eb mund t\u00eb arrihet me 7 raunde n\u00eb vend t\u00eb 10 duke ruajtur t\u00eb nj\u00ebjtin nivel besueshm\u00ebrie (p\u00ebr ilustruar, mund t\u00eb japim nj\u00eb shembull me p\u00ebrzierjen e frutave n\u00eb mikser \u2014 pas 7 sekondash frutat jan\u00eb tashm\u00eb t\u00eb p\u00ebrziera plot\u00ebsisht dhe 3 sekonda t\u00eb tjera nuk do t\u00eb ken\u00eb ndikim n\u00eb konsistenc\u00ebn e p\u00ebrzierjes). Megjithat\u00eb, disa k\u00ebrkues shprehin dyshime, duke besuar se edhe n\u00ebse p\u00ebr momentin 7 raunde jan\u00eb t\u00eb mjaftueshme p\u00ebr t'u p\u00ebrballur me sulmet e njohura n\u00eb hash, 3 raunde shtes\u00eb mund t\u00eb jen\u00eb t\u00eb dobishme n\u00eb rast se zbulohen sulme t\u00eb reja n\u00eb t\u00eb ardhmen. <\/p>\n

Sa i p\u00ebrket ndarjes n\u00eb blloqe, BLAKE3 ndan rrjedh\u00ebn n\u00eb copa prej 1 KB dhe \u00e7do cop\u00eb hash-izohet n\u00eb m\u00ebnyr\u00eb t\u00eb pavarur. Bazuar n\u00eb hash-et e copave mbi pem\u00ebn binar t\u00eb Merkle<\/a><\/noindex> formohet nj\u00eb hash i madh. Kjo ndarje lejon t\u00eb zgjidhet problemi i p\u00ebrpunimit t\u00eb paralel t\u00eb t\u00eb dh\u00ebnave gjat\u00eb llogaritjes s\u00eb hash-it \u2014 p\u00ebr shembull, mund t\u00eb p\u00ebrdoren instrukcione SIMD me 4 shkall\u00eb p\u00ebr t\u00eb llogaritur n\u00eb t\u00eb nj\u00ebjt\u00ebn koh\u00eb hash-et e 4 blloqeve. Funksionet tradicionale t\u00eb hash-it SHA-* p\u00ebrpunojn\u00eb t\u00eb dh\u00ebnat nj\u00ebpasnj\u00ebrisht. <\/p>\n

Ve\u00e7orit\u00eb e BLAKE3:<\/p>\n