SLAYDLI KRIPTOTАHLIL HUJUMI TAHLILI
Keywords:
slaydli hujum, blokli shifr, kriptotahlil, Birthday Paradox, kalit jadvali, slid pair, WeakCipher, Python, Tkinter, Monte Carlo simulatsiyasiAbstract
Ushbu maqolada blokli shifrlarning tuzilmaviy zaifliklarini aniqlashga mo'ljallangan slaydli kriptotahlil hujumi (Slide Attack) nazariy va amaliy jihatdan ko'rib chiqiladi. Alex Biryukov va David Wagner tomonidan 1999-yilda taklif etilgan ushbu hujum usuli, bir xil raund funksiyalari takrorlanadigan shifrlarni n ta raunddan qat'i nazar murakkablikda buzib ochishi mumkinligi isbotlanadi.
Tadqiqotda WeakCipher (zaif shifr) va StrongCipher (kuchli, kalit jadvalili shifr) modellari taqqoslanadi. Birthday Paradox asosidagi slid pair qidiruv algoritmi, O(N) murakkablikdagi hashmap usuli va ovoz berish mexanizmi (voting) orqali kalit chiqarish jarayoni batafsil tahlil qilinadi. Python dasturlash tilida Tkinter grafik interfeys asosida yaratilgan interaktiv tadqiqot vositasi orqali Monte Carlo simulatsiyasi, raund sonidan mustaqillik testi va zaif-kuchli shifr taqqoslamasi eksperimental yo'l bilan ko'rsatiladi.
Tadqiqot natijalari shuni ko'rsatadiki, kalit jadvali (key schedule) mavjud bo'lmagan shifrlar slaydli hujumga to'liq zaif bo'lib, raund sonini oshirish bu muammoni hal eta olmaydi. Zamonaviy shifrlarni (AES, PRESENT) himoyalashda raund konstantalari va kalit kengaytirish funksiyasining muhim roli eksperimental tarzda tasdiqlanadi
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