Boka revatsvagiri kubva kuDavid Ben-Gurion University (Israel) yakagadzira nzira nyowani yekurwisa chiteshi inobvumira kudzoreredza kure kure ukoshi hwemakiyi encryption zvichibva paECDSA uye SIKE algorithms nekuongorora vhidhiyo kubva kamera inotora chiratidzo cheLED chemuverengi kadhi akangwara kana chishandiso chakabatana kune imwechete USB hub ine smartphone inoita mashandiro nekiyi.
Nzira yacho inobva pakuti munguva yekuverenga, zvichienderana nekushanda kunoitwa paCPU, kushandiswa kwesimba kunoshanduka, izvo zvinotungamirira kukuchinja kuduku mukupenya kwemagetsi e LED zviratidzo. Shanduko mukupenya, iyo inopindirana zvakananga nemaverengero akaitwa, inogona kubatwa pamazuva ano edhijitari vhidhiyo yekutarisa makamera kana smartphone kamera, uye kuongororwa kwedata kubva kamera inokubvumira kuti udzorere zvisina kunanga ruzivo rwakashandiswa mukuverenga.
Kunzvenga mipimo yesampling yechokwadi ine chekuita nekurekodha mafuremu makumi matanhatu kana zana nemakumi maviri pasekondi chete, temporal parallax mode (rolling shutter) inotsigirwa nemamwe makamera yakashandiswa, iyo inoratidza zvikamu zvakasiyana zvechinhu chiri kukurumidza kuchinja panguva dzakasiyana mune imwe furemu. Iko kushandiswa kweiyi modhi kunobvumidza iwe kuongorora anosvika zviuru makumi matanhatu zviyero zvekupenya pasekondi kana uchipfura pa iPhone 60 Pro Max kamera ine yekutanga frequency ye120 FPS, kana mufananidzo wechiratidzo che LED ukatora furemu yese (lenzi yakafumurwa pamberi pe lens kuti uwedzere mukati). Ongororo iyi yakatarisa shanduko yemhando yemhando yemhando (RGB) yechiratidzo, zvichienderana nekuchinja kwekushandiswa kwesimba kwe processor.
Kudzoreredza makiyi, nzira dzinozivikanwa dzeHertzbleed kurwisa kweSIKE kiyi encapsulation mechanism uye Minerva paECDSA dijitari siginecha algorithm yakashandiswa, yakagadziridzwa kuti ishandiswe neyakasiyana sosi yekudonha kuburikidza neyechitatu-bato nzira. Kurwiswa uku kunoshanda chete kana uchishandisa ECDSA isina njodzi uye SIKE kuita muLibgcrypt uye PQCrypto-SIDH maraibhurari. Semuenzaniso, maraibhurari akabatwa anoshandiswa muSamsung Galaxy S8 smartphone uye matanhatu smart makadhi akatengwa kubva kuAmazon kubva kune vashanu vagadziri vakasiyana.
Vatsvakurudzi vakaita zviedzo zviviri zvakabudirira. Mune yekutanga, zvakakwanisika kudzoreredza kiyi ye256-bit ECDSA kubva ku smartcard nekuongorora vhidhiyo yechiratidzo cheLED chemuverengi we smartcard, yakatorwa pavhidhiyo yekutarisa kamera yakabatana kune network yepasirese, iri 16 metres kubva pachigadzirwa. Kurwiswa kwacho kwakatora nguva ingangoita awa uye kwaida kusikwa kwemasaini edhijitari zviuru gumi.
Muchiyedzo chechipiri, zvakakwanisika kudzoreredza kiyi ye378-bit SIKE yakashandiswa paSamsung Galaxy S8 smartphone zvichibva pakuongororwa kwevhidhiyo kurekodha chiratidzo chesimba cheLogitech Z120 USB vatauri vakabatana kune imwechete USB hub iyo iyo smartphone yakachajwa. Vhidhiyo iyi yakatorwa ne iPhone 13 Pro Max. Munguva yekuongorora, kurwiswa kweciphertext kwakaitwa pa-smartphone (kufungidzira zvishoma nezvishoma kunoenderana nekugadzirisa ciphertext uye kuwana decryption yayo), panguva iyo 121 maoparesheni akaitwa nekiyi yeSIKE.
Source: opennet.ru