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Introduction

  • PROJECT TOPIC 

    Book titled 'Cryptography'

    E- BOOK

    (NEVİN BİLGİÇLİ/KIRIKKALE HIGH SCHOOL)

     

    ENCRYPTION TERMS

    You can see below, some basic encryption terms: sender, reciever, plain alphabet, cipher alphabet, plaintext, ciphertext, key, encryption, decryption, breaking cipher

     

     

    ENCRYPTION TYPES

    You can see below some encryption types in history .

     

     

    Monoalphabetic Type:Only one alphabet is used in this type. Each letter in the plaintext, always corresponds to the one fixed letter in the ciphertext. This type ciphers can be broken with the frequency analysis  of letters.

    Polyalphabetic Type: More than one alphabet is used in this type. Each letter in the plaintext, corresponds to  different letters in the ciphertext each time. Breaking of this type is more difficult than monoalphabetic types. Frequency analysis method is not enough to break these types. İt can be broken by Kasiski analysis.

    Substitution Type: Each letter/symbol in the plaintext is replaced by another letter/symbol according to  key (secret rule).

    Transposition Type: Only the places of the letters in the plaintext are changed according to  key.

     

    ENCRYPTION HISTORY

    You can see the encryption  methods/ tools from the past to the present in the video below

     

    NEVİN BİLGİÇLİ/KIRIKKALE HIGH SCHOOL

    NURİYE PINAR TOZMAN/ ALTINDAG ANATOLİAN IMAMA HATIP HIGH SCHOOL