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Kriptografi
Kritografi
• Kritografi “kuno”
– Subtitusi Cipher
– Transposisi Cipher
• Kriptografi Modern
Kriptografi Kuno
• Subtitution Cipher
– Monoalphabetic Cipher
– Polyalphabetic Cipher
• Transposition Cipher
– Mirror/Reverse, Rail Fence, Geometric Figure
– Row Transposition Cipher
– Block Transposition Cipher
– ADVGFX Product Cipher
Monoalphabetic Cipher
• Caesar Chiper– L FDPH L VDZ L FRQTXHUHG– I CAME I SAW I CONQUERED
• Mixed Monoalphabetic Cipher
– A M I K O M– D C W E H C
Plain 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
Cipher D E F G H I J K L M N O P Q R S T U V W X Y Z A B C
Plain 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
Cipher D K V Q F I B J W P E S C X H T M Y A U O L R G Z N
Monoalphabetic Cipher
• Easier Monoalphabetic Cipher
– B E R D A S I
– M O C K A D S
• Kelemahan :
– Frekuensi kemunculan huruf tidak dapat dihilangkan
Plain 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
Cipher A M I K O P Q R S T U V W X Y Z B C D E F G H J L N
Polyalphabetic Cipher
• Vigenere CiPHER
T E M P A T K U L I A H C A L O N P E N G U S A H A
Keyword A M I K O M A M I K O M A M I K O M A M I K O M A M
T Q U Z O F K G T S O T C M T Y B B E Z O E G M H M
Plaintext
Ciphertext
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
A 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
M M N O P Q R S T U V W X Y Z A B C D E F G H I J K L
I I J K L M N O P Q R S T U V W X Y Z A B C D E F G HK K L M N O P Q R S T U V W X Y Z A B C D E F G H I J
O O P Q R S T U V W X Y Z A B C D E F G H I J K L M N
Polyalphabetic Cipher
• Beuford Cipher
T E M P A T K U L I A H C A L O N P E N G U S A H A
Keyword A M I K O M A M I K O M A M I K O M A M I K O M A M
H I W V O T Q S X C O F Y M X W B X W Z C Q W M T M
Plaintext
Ciphertext
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
A A Z Y X W V U T S R Q P O N M L K J I H G F E D C B
M M L K J I H G F E D C B A Z Y X W V U T S R Q P O N
I I H G F E D C B A Z Y X W V U T S R Q P O N M L K JK K J I H G F E D C B A Z Y X W V U T S R Q P O N M L
O O N M L K J I H G F E D C B A Z Y X W V U T S R Q P
Polyalphabetic Cipher
• Varian Beuford Cipher
T E M P A T K U L I A H C A L O N P E N G U S A H AKeyword A M I K O M A M I K O M A M I K O M A M I K O M A M
G H V U N S Q R W B P E X L W V A W V A B P V L S L
Plaintext
Ciphertext
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
A Z Y X W V U T S R Q P O N M L K J I H G F E D C B A
M L K J I H G F E D C B A Z Y X W V U T S R Q P O N M
I H G F E D C B A Z Y X W V U T S R Q P O N M L K J IK J I H G F E D C B A Z Y X W V U T S R Q P O N M L K
O N M L K J I H G F E D C B A Z Y X W V U T S R Q P O
Polyalphabetic Cipher
• Autokey Cipher
• Book Chiper
– Mengambil kunci dari suatu alamat buku
T E M P A T K U L I A H C A L O N P E N G U S A H A
Keyword A M I K O M T E M P A T K U L I A H C A L O N P E N
Plaintext
Transposition Cipher
• Reverse Cipher
– AHAS UGNE PNOLA CTAP METMO KIMA
• Rail Fence cipher
– JLN AIR NYGA ATA AKLU AGOY KRA
• Geometric Figure
– KSEDIR IFERAP TRHA NAGO
Transposition Cipher
• Row Transposition Cipher
Chipertext : EAPTM KILTU HLAAC NNEOP UHAGS AAAAA
– Kunci :
T E M P A T K U L I A H C A L O N P E N G U S A H A
1 2 3 4 5 1 2 3 4 5
Key(W) 2 5 4 1 3 R 4 1 5 3 2
T E M P A E A P T MT K U L I K I L T U
A H C A L H L A A C
O N P E N N N E O P
G U S A H U H A G S
A A A A A A A A A A
Plaintext
A M I K O M
Keyword 1 4 2 3 5 6
Kunci
Transposition Cipher
• Block(Cloumnar) Transposition Cipher
Chipertext : EKH NUAA ILNHA PLAE AATTAO GAMUC PSA
Plaintext T E M P A T K U L I A H C A L O N P E N G U S A H A
1 2 3 4 5 1 2 3 4 5
Key(W) 2 5 4 1 3 R 4 1 5 3 2
T E M P A E A P T MT K U L I K I L T U
A H C A L H L A A C
O N P E N N N E O P
G U S A H U H A G S
A A A A A A A A A A
Transposition Cipher
• Nihilist Transposition Cipher
Chipertext : NNEO PEAP TMUH AGSH LAAC KIL TUAA AAA
T E M P A T K U L I A H C A L O N P E N G U S A H A
1 2 3 4 5 1 2 3 4 5
Key(W) 2 5 4 1 3
T E M P A 2 E A P T MT K U L I 5 K I L T U
A H C A L 4 H L A A C
O N P E N 1 N N E O P
G U S A H 3 U H A G S
A A A A A 6 A A A A A
Plaintext
Transposition Cipher
• Diagonal Transposition Cipher
Chipertext : EAKHI PTLLN UNAT MUAE JAAAO CPGA ASA
T E M P A T K U L I A H C A L O N P E N G U S A H A
1 2 3 4 5 1 2 3 4 5
Key(W) 2 5 4 1 3
T E M P A E A P T MT K U L I K I L T U
A H C A L H L A A C
O N P E N N N E O P
G U S A H U H A G S
A A A A A A A A A A
Plaintext
Transposition Cipher
• ADFGVX Product Transposition Cipher
Plaintext : A M I K O M
Intermediate : GV XX XF AA VD XX
A D F G V X
A K Z W R 1 F
D 9 B 6 C L 5
F Q 7 J F G X
G E V Y 3 A N
V 8 O D H 0 2
X U 4 I S T M
Transposition Cipher
• Plaintext : A M I K O M
• Intermediate : GV XX XF AA VD XX
– Kemudian dilakukan transposisi dengan suatu kunci
– mis key : DASI (2143)
– Ciphertext : VFDGXV XAXXAX
2 1 4 3
G V X X V G X X
X F A A F X A A
V D X X D V X X
