message hiding
TRANSCRIPT
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BY,,,,,,
MAYURI & APURVA
COMPUTER SECURITYIN MESSAGE HIDING
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CONTAINS:
1. Cryptography
2. Cryptanalysis
3. Cryptology
4. SUBSTITUTION TECHNIQUES
5. TRANSPOSITON TECHNIQUES
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Cryptography:Readable
textCryptographic
systemUnreadable
text
It convert the Readable text in a Unreadable text.
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Cryptanalysis:
Unreadabletext
Cryptologysystem
Readabletext
It convert the Unreadable text in a Readable text.
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Cryptology:
It I the combination of Cryptography and Cryptanalysis
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Cryptology:
INCRYPTIONDECRYPTION
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ENCRYPTION:
Plain text ENCRYPT Cipher text
Plain text is convert to the Cipher text.
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DECRYPTION:
Cipher text DENCRYPT Plain text
Cipher text is convert to the Plain text.
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ENCRYPTION AND DECRYPTION:
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SUBSTITUTION TECHNIQUES:
CAESAR`S CIPHER VIGENERE CIPHER
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CAESAR`S CHIPER:
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VIGENERE CHIPHER:
Click icon to add picture
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CIPHER TEXT:
OVBRGGMJWYOIWRURGM
key
Plain text
C R I N G E F R I N G E F R I N G E
M E T E A C H S O L I E R A M E A l
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TRANSPOSITON TECHNIQUES:
RAIL FENCE CIPHER COLUMNAR TRANSPOSITION STEGANOGRAPHY
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RAIL FENCE CIPHER:
Plain text: COME HOME TOMORROW
Cipher text:
CMHMTMROOEOEOORW
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COLUMNAR TRANSPOSITION:
KEYWORD: ZEBRASMASSAGE: WE ARE DISCOVERED FLEE AT ONCE
Z E B R A S
6 3 2 4 1 5
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CIPHER TEXT:EVLN ACDT ESEA ROFO DEEC WIREE
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STEGANOGRAPHY
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CONCLUSION :-
It is major achievement in computer engineering.It will allow perfectly secure messages ,secure discussion etc. between sender and receiver.
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ANY QUESTION??????