O’zbekiston respublikasi axborot texnologiyalari va kommunikatsiyalarini rivojlantirish vazirligi muhammad al-xorazmiy nomidagi toshkent axborot texnologiyalari universiteti samarqand filliali


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O’ZBEKISTON RESPUBLIKASI AXBOROT TEXNOLOGIYALARI VA
KOMMUNIKATSIYALARINI RIVOJLANTIRISH VAZIRLIGI
MUHAMMAD AL-XORAZMIY NOMIDAGI TOSHKENT AXBOROT TEXNOLOGIYALARI UNIVERSITETI SAMARQAND FILLIALI



“Kompyuter injiniringi” fakulteti


“Dasturiy injiniring” kafedrasi


INDIVIDUAL LOYIHA


Mavzu: “Oddiy almashtirish usuli yordamida matnni shifrlash va deshifrlash
dasturini ishlab chiqish”


Talaba: Abdurasulov. M
Individual loyiha rahbari: Maxmidov. Sh


SAMARQAND-2023
Mundarija:
Kirish .................................................................................................................. 3
I BOB. Terminologiya va kriptografiya tarixi ................................................ 6

    1. . Kriptografiyaning tarixi ...................................................................... 9

    1. Shifrlash va kodlashning farqi ......................................................... 10

II BOB. Shifrlash usulllari .............................................................................. 13

    1. Oddiy almashtirish shifrlash ............................................................ 13

    2. Sezar shifrlash tizimi ......................................................................... 14

    3. Vijener shifrlash tizimi ...................................................................... 20

    4. Vernam usuli yordamida shifrlash ................................................... 22

III BOB.
3.1. Dastur kodi .......................................................................................... 24

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