Gulu la ofufuza ochokera ku David Ben-Gurion University (Israel) lapanga njira yatsopano yowukira gulu lachitatu lomwe limakupatsani mwayi wobwezeretsanso patali makiyi achinsinsi potengera ma algorithms a ECDSA ndi SIKE kudzera kusanthula kanema kuchokera pa kamera yomwe. imagwira chizindikiro cha LED cha owerenga makhadi anzeru kapena chida cholumikizidwa ku USB hub imodzi yokhala ndi foni yamakono yomwe imagwira ntchito ndi dongle.
Njirayi imachokera ku mfundo yakuti powerengera, kutengera ntchito zomwe zimachitika pa CPU, kusintha kwa mphamvu zamagetsi, zomwe zimabweretsa kusinthasintha kochepa kwa kuwala kwa zizindikiro za mphamvu za LED. Kusintha kwa kuwala, komwe kumagwirizana mwachindunji ndi mawerengedwe omwe amachitidwa, akhoza kugwidwa pa makamera amakono owonetsera kanema wa digito kapena makamera a foni yamakono, ndi kusanthula deta kuchokera ku kamera kumakupatsani mwayi wobwezeretsa mosadziwika bwino zomwe zimagwiritsidwa ntchito powerengera.
Kudumpha malire a kulondola kwa zitsanzo zomwe zimagwirizanitsidwa ndi kujambula mafelemu 60 kapena 120 pa sekondi imodzi, mawonekedwe a temporal parallax (rolling shutter) omwe amathandizidwa ndi makamera ena adagwiritsidwa ntchito, omwe amawonetsera mbali zosiyanasiyana za chinthu chosintha mofulumira nthawi zosiyanasiyana mu chimango chimodzi. Kugwiritsa ntchito mawonekedwewa kumakupatsani mwayi wowunikira mpaka miyeso yowala yokwana 60 pa sekondi iliyonse mukamawombera pa iPhone 13 Pro Max kamera yokhala ndi ma frequency a 120 FPS, ngati chithunzi cha chizindikiro cha LED chikutenga chimango chonse (magalasi adawululidwa. kutsogolo kwa lens kuti muwonekere). Kuwunikaku kunaganizira kusintha kwa magawo amtundu wamtundu uliwonse (RGB) wa chizindikirocho, kutengera kusintha kwa mphamvu ya purosesa.
Kuti abwezeretse makiyi, njira zodziwika bwino za Hertzbleed zowukira pa SIKE key encapsulation mechanism ndi Minerva pa ECDSA digito siginecha algorithm zidagwiritsidwa ntchito, zosinthidwa kuti zigwiritsidwe ntchito ndi gwero lina la kutayikira kudzera munjira za chipani chachitatu. Kuwukiraku kumakhala kothandiza mukamagwiritsa ntchito ECDSA ndi SIKE kukhazikitsa mu library ya Libgcrypt ndi PQCrypto-SIDH. Mwachitsanzo, malaibulale omwe akhudzidwawo amagwiritsidwa ntchito mu foni yam'manja ya Samsung Galaxy S8 ndi makhadi asanu ndi limodzi ogulidwa kuchokera ku Amazon kuchokera kwa opanga asanu osiyanasiyana.
Ofufuzawo adachita zoyeserera ziwiri zopambana. Koyamba, zinali zotheka kupezanso kiyi ya 256-bit ECDSA kuchokera ku smartcard posanthula kanema wa chizindikiro cha LED cha smartcard reader, chojambulidwa pa kamera yowonera kanema yolumikizidwa ndi netiweki yapadziko lonse lapansi, yomwe ili pamtunda wa 16 metres kuchokera pa chipangizocho. Kuukiraku kunatenga pafupifupi ola limodzi ndipo kumafuna kuti pakhale ma signature 10 a digito.
Pakuyesa kwachiwiri, zinali zotheka kubwezeretsanso kiyi ya 378-bit SIKE yomwe idagwiritsidwa ntchito pa foni yam'manja ya Samsung Galaxy S8 kutengera kuwunika kwa kanema wojambulira chizindikiro champhamvu cha Logitech Z120 USB speaker cholumikizidwa ndi USB hub yomweyo. foni yamakono idaperekedwa. Kanemayo adajambulidwa ndi iPhone 13 Pro Max. Pakuwunikaku, kuwukira kwa ma ciphertext kudachitika pa foni yam'manja (kungoyerekeza pang'onopang'ono kutengera kusintha mawu ndikupeza kumasulira kwake), pomwe maopaleshoni 121 adachitidwa ndi kiyi ya SIKE.
Source: opennet.ru