{"id":64515,"date":"2018-06-18T14:30:05","date_gmt":"2018-06-18T09:30:05","guid":{"rendered":"https:\/\/uzsoft.uz\/ecdsa-va-dsa-shifrlash-algoritmlarini-buzish-usuli-aniqlandi\/"},"modified":"2018-06-18T14:30:05","modified_gmt":"2018-06-18T09:30:05","slug":"ecdsa-va-dsa-shifrlash-algoritmlarini-buzish-usuli-aniqlandi","status":"publish","type":"post","link":"https:\/\/uzsoft.uz\/uz\/ecdsa-va-dsa-shifrlash-algoritmlarini-buzish-usuli-aniqlandi\/","title":{"rendered":"ECDSA va DSA shifrlash algoritmlarini buzish usuli aniqlandi"},"content":{"rendered":"

\"ECDSA<\/p>\n

\n\t\t\tMuvaffaqiyatli hujum qurilmaga imtiyozsiz kirishni talab qiladi.<\/p>\n

NCC Group xavfsizlik mutaxassislari CVE-2018-0495 zaifligidan foydalanadigan yangi yon kanalli hujum usuli haqida xabar berishdi, bu esa shaxsiy kalitlarni qayta tiklash orqali ECDSA va DSA shifrlash algoritmlarini buzishga imkon beradi. Tadqiqotchilarning fikriga ko’ra, tajovuzkor hisoblashlar paytida kechikish o’zgarishlarini o’lchash orqali protsessor keshidan ma’lumot olish uchun ushbu zaiflikdan foydalanishi mumkin. Muvaffaqiyatli hujum raqamli imzo yaratilayotgan qurilmaga imtiyozsiz kirishni talab qiladi. <\/p>\n

Ushbu zaiflik OpenSSL, LibreSSL, Libgcrypt (ECDSA), Mozilla NSS, Botan (ECDSA), WolfCrypt (ECDSA), LibTomCrypt (ECDSA), LibSunEC (ECDSA), MatrixSSL (ECDSA), BoringSSL (DSA) va CryptLib kutubxonalariga ta\u02bcsir qiladi. <\/p>\n

Hujumdan himoyalanish uchun hisoblash jarayonida qo\u2018shimcha sondan foydalanish taklif etiladi: bunda maxfiy parametr ushbu songa ko\u2018paytiriladi va keyinchalik olingan natija teskari qiymatga aylantiriladi. <\/p>\n

DSA (Raqamli imzo algoritmi) \u2014 bu raqamli imzolar yaratish uchun qo\u2018llaniladigan, ammo ma\u2019lumotlarni shifrlash uchun mo\u2018ljallanmagan ochiq kalitli kriptografik algoritmdir. Imzo maxfiy tarzda yaratiladi, biroq uning haqiqiyligini ochiq tekshirish mumkin. Bu shuni anglatadiki, xabar uchun imzoni faqat bitta tomon yarata oladi, ammo uning haqiqiyligini istalgan shaxs tekshirib ko\u2018rishi mumkin. <\/p>\n

ECDSA (Elliptik egri chiziq asosidagi raqamli imzo algoritmi) \u2014 raqamli imzolar yaratishga mo\u2018ljallangan ochiq kalitli algoritmdir; u tuzilishi jihatidan DSAga o\u2018xshash bo\u2018lsa-da, undan farqli o\u2018laroq, butun sonlar halqasi ustida emas, balki elliptik egri chiziqdagi nuqtalar guruhi ustida aniqlanadi. <\/p>\n","protected":false},"excerpt":{"rendered":"

Muvaffaqiyatli hujum qurilmaga imtiyozsiz kirishni talab qiladi. NCC Group xavfsizlik mutaxassislari CVE-2018-0495 zaifligidan foydalanadigan yangi yon kanalli hujum usuli haqida xabar berishdi, bu esa shaxsiy kalitlarni qayta tiklash orqali ECDSA va DSA shifrlash algoritmlarini buzishga imkon beradi. Tadqiqotchilarning fikriga ko’ra, tajovuzkor hisoblashlar paytida kechikish o’zgarishlarini o’lchash orqali protsessor keshidan ma’lumot olish uchun ushbu zaiflikdan foydalanishi […]<\/p>\n","protected":false},"author":0,"featured_media":51009,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_meta-robots-noindex":"","_yoast_wpseo_meta-robots-nofollow":"","_yoast_wpseo_canonical":"","_yoast_wpseo_opengraph-title":"","_yoast_wpseo_opengraph-description":"","_yoast_wpseo_opengraph-image":"","_yoast_wpseo_opengraph-image-id":"","_yoast_wpseo_twitter-title":"","_yoast_wpseo_twitter-description":"","_yoast_wpseo_twitter-image":"","_yoast_wpseo_schema_page_type":"","_yoast_wpseo_schema_article_type":"","footnotes":""},"categories":[52855],"tags":[],"class_list":["post-64515","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-yangiliklar"],"featured_image_src":{"landsacpe":["https:\/\/uzsoft.uz\/wp-content\/uploads\/2018\/06\/d7d1c943a9d497e536b53f0540a30dd1.jpg",600,354,false],"list":["https:\/\/uzsoft.uz\/wp-content\/uploads\/2018\/06\/d7d1c943a9d497e536b53f0540a30dd1.jpg",463,273,false],"medium":["https:\/\/uzsoft.uz\/wp-content\/uploads\/2018\/06\/d7d1c943a9d497e536b53f0540a30dd1-300x177.jpg",300,177,true],"full":["https:\/\/uzsoft.uz\/wp-content\/uploads\/2018\/06\/d7d1c943a9d497e536b53f0540a30dd1.jpg",600,354,false]},"yoast_head":"\nECDSA 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