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2 -амалий иш модулга (1). 2Амалий иш Мавзу Криптографик имоялаш
Deshifrlash ____ bizga ma’lum kalit so’zning harflari va alifbodagi harflar sonidan kelib chiqan holda jadval yaratamiz va jadvalga ma’lumotlarni quyidagi tartibda kiritamiz:
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Shifr matn ma’lum. ZUYGFOCIYLCFWZB Shifr matn va kalit so’zning mos harflari tutashgan qismidagi jadval ma’lumotlarini yig’ib chiqsak ochiq matn hosil bo’ladi.
M=MAHMUDOVNURULLO
Vernam shifrlash usuli:
Ochiq matn M= MAHMUDOVNURULLO ; Kalit K=NURULLO
Alifbodagi harflarni ikkilik sanoq sistemasida ifodalab olishim kerak. Bunda harflar 26 ta 255 ko’rinishida olsam bo’ladi.
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