Mavzu: kriptografik himoyalash
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2-amaliy mashgulot uchun topshiriq (3)
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- A 5/1 kalit generatori yordamida simmetrik oqimli shifrlash algoritmi № A 5/1 kalit generatori uchun ochiq
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KIBERXAVFSIZLIK ASOSLARI FANIDAN 2-AMALIY MASHG’ULOT BO’YICHA VAZIFALAR. MAVZU: KRIPTOGRAFIK HIMOYALASH. 1-Vazifa: Quyidagi jadvaldan o’z jurnal raqamingizga mos shifrmatnni olib Sezar usulida deshifrlang. Kalit k=7 ga teng. T/r
Shifrmatn T/r
Shifrmatn 1 Puapsnhunh avsl fvy 15 Tlu Zlghyup ahupthfthu 2 Heivyva ehcmzpgspnp rhmlkyhzp 16 Zlghy ibfbr ch xbkyhasp 3 Rpilyehcmzpgspr hzvzshyp 17 Chgpmhup ihqhythzht ohfkhshthu 4 Ylhs Thkypk qhtvhzp 18 Pqaptvpf ahytvxkh mhvsthu 5 Ihyzlsvuh qhtvhzp 19 Nbf Fbspf Zlghy bzbsp 6 Thujolzaly Bupalk qhtvhzp 20 Tlu AHAB ahshihzpthu 7 Hyzluhs ibfbr qhtvh 21 Ahytvx ehcmzpgspnp tbopt chgpmh 8 Ibnbu klhkspul rbup 22 Tlu Thujolzaly qhtvhzpkhuthu 9 Heivyva ch rpilyehcmzpspr 23 Tlupun chgpmht Zlghy bzbsp 10 Chahu tbxhkkhzkpy 24 Zlghy bzbspup ipsthfthu 11 Ib tlupun chgpmht 25 Tlu yvzh bfxfjopthu 12 Tlunh ilypsnhu chgpmh xpfpu 26 Tlu yvzh khunhzhthu 13 Ipg ipy qhtvhtpg 27 Khyzshyup fvxapythfthu 14 Heivyvaupun ibfbr xbkyhap 28 Rpilyehcmzpspr fhezop mhu
Quyidagi jadvaldan o’z jurnal raqamingizga mos boshlang’ich matnni olib, ikki tomonlama o’rin almashtirish usuli yordamida shifrlang. T/r Shifrmatn T/r Shifrmatn 1 Kiberxavfsizlik fani zo’r fan ekan 15 Identifikatsiya-bu foydalanuvchi nomi 2 Dars tayyorlash talabaning majburiyati 16 Katta bo’lsam administrator bo’laman 3 Olim bo’lsang olam seniki 17 To’rt marta darsga bormadim 4 Kitob bilim bulog’idir. 18 O’rin almashtirish-simmetrik algoritm 5 Semestrni uch bahoga yopdim. 19 RSA-asimmetrik shifrlash usulidir 6 Hamma baholarim a’lo bo’ldi 20 Seshanba kuni deadline kuni 7 Ijtimoi tarmoqlar dushmanimiz 21 22-oktabr kiberxavfsizlik deadlineni 8 Internet-bu dangasalik 22 O’zbekiston-kelajagi buyuk davlat 9 Bilimi zo’r mingni yiqar 23 Bu vazifalarni tezroq bajarish kerak 10 Vatanni sevmoq iymondandir 24 O’rin almashtirish usulining jadvali 11 Men matematikani yomon ko’raman 25 Berilgan raqamlarning o’sish tartibi 12 Yaponiyaning poytaxti Tokio shahri 26 Matematika fanlar ichra shoh 13 Toshkent go’zal va so’lim shahar 27 Menga oson vazifa to’g’ri keldi 14 Kriptografiya qiziqarli fanlardan biridir 28 Berilgan vazifa juda qiyin ekan
3-Vazifa: Familiya va sharif boshlang’ich matn sifatida, ism esa kalit sifatida ishlatilib Vernam hamda Vijiner usullarida shifrlash va deshifrlash amallari bajarilsin 4-Vazifa: Tug’ilgan joy (masalan Farg’ona viloyati, Toshkent shahri, Qoraqalpog’iston respublikasi va hokazo) ikkilik kvadrat usuli hamda sehrli kvadrat usullari yoqdamida shifrlab va deshifrlansin. 5-Vazifa: Ismingiz hamda tug’ilgan yilingizni (masalan Shahboz_1999) gammalash shifrlash algoritmi yordamida shifrlang va deshifrlang. Alifbo turi, unda foydalanilgan belgilar soni va alifboning uzunligi ixtiyoriy tanlanadi. 6-Vazifa: RSA asimmetrik shiflash usuli yordamida tug’ilgan kun, oy, yil (masalan 28.11.1998) sonlari shiflansin va deshifrlansin. Tanlanayotgan tub sonlar 50 dan, ochiq kalit “d” esa 30 dan kichik bo’lmasligi kerak. Hisoblashlar qiyinchilik tug’dirsa WINDOWS kalkulyatoridan (Win+R oynasida “calc” deb yoziladi) foydalaning. 7-Vazifa: Quyidagi savollarga o’z tushunchangizdan kelib chiqib javob bering. Kitobiy berilgan javoblar inobatga olinmaydi. 1.
Shirlash tushunchasini izohlang. 2.
Shifrlash hamda kodlash tushunchalarining farqi nima? 3.
Kriptografiya va steganografiya nima? 4.
Axborot xavfsizligining nechta tamoyili bor? 5.
Himoyalash vositalari nechchi turga bo’linadi va ular qaysilar? A 5/1 kalit generatori yordamida simmetrik oqimli shifrlash algoritmi № A 5/1 kalit generatori uchun ochiq matn (M) Kalit (K) 1. 01101010 0110101011101010010100000110101010001101010010010001010100011010 2. 01101010 1101110111101010010100000110101010001101010010010001010100011010 3. 01101010 1011010111101010010100000110101010001101010010010001010100011010 4. 01101010 0001101011101010010100000110101010001101010010010001010100011010 5. 01101010 1110101011101010010100000110101010001101010010010001010100011010 6. 01101010 1101010011101010010100000110101010001101010010010001010100011010 7. 01101010 1010101111101010010100000110101010001101010010010001010100011010 8. 01101010 0101011111101010010100000110101010001101010010010001010100011010 9. 01101010 1010111011101010010100000110101010001101010010010001010100011010 10.
01101010 0101110111101010010100000110101010001101010010010001010100011010 11. 01101010
0110101011101010010100000110101010001101010010010001010100011010 12.
01101010 1101010111101010010100000110101010001101010010010001010100011010 13. 01101010
1010101111101010010100000110101010001101010010010001010100011010 14.
01101010 1011101011101010010100000110101010001101010010010001010100011010 15. 01101010
0101110111101010010100000110101010001101010010010001010100011010 16.
01101010 1110101011101010010100000110101010001101010010010001010100011010 17. 01101010
1101010011101010010100000110101010001101010010010001010100011010 18.
01101010 0101001011101010010100000110101010001101010010010001010100011010 19. 01101010
0011010111101010010100000110101010001101010010010001010100011010 20.
01101010 0110101011101010010100000110101010001101010010010001010100011010 21. 01101010
1111010111101010010100000110101010001101010010010001010100011010 22.
01101010 0101010111101010010100000110101010001101010010010001010100011010 23. 01101010
0001110111101010010100000110101010001101010010010001010100011010 24.
01101010 1010100011101010010100000110101010001101010010010001010100011010 25. 01101010
1011111011101010010100000110101010001101010010010001010100011010 26.
01101010 1010111111101010010100000110101010001101010010010001010100011010 27. 01101010
0001010111101010010100000110101010001101010010010001010100011010 28.
01101010 1001011111101010010100000110101010001101010010010001010100011010 Download 120.1 Kb. Do'stlaringiz bilan baham: 
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