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METODE ALFABETIK
(MONOALFABETIK, POLYALFABETIK, AFFIENALFABETIK,
PLAYFAIR)
EGGI CHANDRA
M. JODI KEREN BANGET
M. IQBAL ASYRAFI
RATNA INDRAWATI
METODE MONOALFABETIK
• Merupakan salah satu metode kriptografi klasik
• tidak hanya memilki kunci dalam bentuk angka tetapi
juga menggunakan string
• string kunci menjadi huruf-huruf awal subtitusi dari
plaintext
• Setiap huruf dalam kunci hanya diperkenankan muncul
sekali
CONTOH METODE MONOALFABETIK
•Tentukan kunci
kunci : welcome
•Sederhanakan kunci
welcom
•Lakukan mapping
PlainAlfabet :
ABCDEFGHIJKLMNOPQRSTUVWXYZ
CipherAlfabet :
WELCOMABDFGHIJKNPQRSTUVXYZ
CONTOH METODE MONOALFABETIK
Mapping Alfabet:
PlainAlfabet : A B C D E F G H I J K L M N O P Q R S
T U V W X Y Z
CipherAlfabet : W E L C O M A B D F G H I J K N P Q R
S T U V X Y Z
Enkripsi & Dekripsi :
Plaintext : BAGI UANG DONG
Ciphertext : EWAD TWJA CKJA

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Jodilayy

  • 1. METODE ALFABETIK (MONOALFABETIK, POLYALFABETIK, AFFIENALFABETIK, PLAYFAIR) EGGI CHANDRA M. JODI KEREN BANGET M. IQBAL ASYRAFI RATNA INDRAWATI
  • 2. METODE MONOALFABETIK • Merupakan salah satu metode kriptografi klasik • tidak hanya memilki kunci dalam bentuk angka tetapi juga menggunakan string • string kunci menjadi huruf-huruf awal subtitusi dari plaintext • Setiap huruf dalam kunci hanya diperkenankan muncul sekali
  • 3. CONTOH METODE MONOALFABETIK •Tentukan kunci kunci : welcome •Sederhanakan kunci welcom •Lakukan mapping PlainAlfabet : ABCDEFGHIJKLMNOPQRSTUVWXYZ CipherAlfabet : WELCOMABDFGHIJKNPQRSTUVXYZ
  • 4. CONTOH METODE MONOALFABETIK Mapping Alfabet: PlainAlfabet : A B C D E F G H I J K L M N O P Q R S T U V W X Y Z CipherAlfabet : W E L C O M A B D F G H I J K N P Q R S T U V X Y Z Enkripsi & Dekripsi : Plaintext : BAGI UANG DONG Ciphertext : EWAD TWJA CKJA