Aircrack Caesar Cipher using Baiji algorithm
Aircrack Caesar Cipher using Baiji algorithm
Introduction:
This algorithm breaks the cipher Text
Written in English(only English language).
This method was invented by
Researcher Abdulwahab Mahdi Saleh.[1]
This algorithm Called Baiji relative to his city.
This algorithm reveals the key to Caesar's algorithm.
Which can be decoded the cipher Text and get the plaintext .
Because the known cryptographic algorithm is known.
The key is secret.
This method is not allowed to be named in another named.
inventor method
Abdulwahab Mahdi Saleh
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Baiji Algorithm:
1- Chose the letter that has the must frequency in cipher text.
2- Find the sequence of letter (letter from step 1)
Start count letters sequence from 0 ->'a' to 25->'z'
3- The number of letter sequence from step 2 called x
4- Key=x-4
5- Using the caser algorithm to decryption the cipher text[2]
Di=(Ci-Key)%26 where i is counter of text.
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Example1: if you have the following cipher text how you can get the plain text using Baiji algorithm (attack)?
Cipher text: XLILSYWIMWRSAJSVWEPIJSVJSYVQMPPMSRHSPPEVWMXMWASVXLQDVILYVVCFIJSVIXLIWIPPIVVIGIMZIWQSVISJJIVW
SOL:
the letter that has the must frequency in cipher text = "I" =14
the sequence of letter:
| 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 |
| 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 |
the sequence of letter "I" is 8 --->X=8
Key=X-4
Key=8-4-->Key=4
Di=(Ci-Key)%26
D(X)=(23-4) %26 = 19--> T
D(L)=(11-4)%26=7-->H
D(I)=(8-4)%26=4--> E
.
.
.
D(W)=(22-4)%26=18--> S
Plain Text:[3]
The house is now for sale for four million dollars it is worth more hurry before the seller receives more offers
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Example2: if you have the following cipher text how you can get the plain text using Baiji algorithm (attack)?
Cipher text[4]: UVACLYFZLJBYL
SOL:
the letter that has the must frequency in cipher text = "L" =3
the sequence of letter:
| 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 |
| 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 |
the sequence of letter "L" is 11 --->X=11
Key=X-4
Key=11-4--> Key=7
Di=(Ci-Key)%26 [5]
D(U)=(20-7)%26=13--> N
D(V)=(21-7)%26=14-->O
D(A)=(0-7)%26=19-->T
D(C)=(2-7)%26=21-->V
D(L)=(11-7)%26=4-->E
D(Y)=(24-7)%26=17-->R
D(F)=(5-7)%26=24-->Y
D(Z)=(25-7)%26=18-->S
D(L)=(11-7)%26=4-->E
D(J)=(9-7)%26=2-->C
D(B)=(1-7)%26=20-->U
D(Y)=(24-7)%26=17-->R
D(L)=(11-7)%26=4-->E
PlainText[6]: NOT VERY SECURE
References[edit]
- ↑ "Abdulwahab Aljumaili". www.facebook.com. Retrieved 2019-02-11.
- ↑ Stallings, William (November 16, 2005). Cryptography and Network Security Principles and Practices. Prentice Hall. p. 592. ISBN 10: 0-13-187316-4 Check
|isbn=value: invalid character (help). Search this book on
- ↑ "Plaintext", Wikipedia, 2018-09-20, retrieved 2019-02-11
- ↑ "Ciphertext", Wikipedia, 2019-01-24, retrieved 2019-02-11
- ↑ "Caesar cipher", Wikipedia, 2019-01-17, retrieved 2019-02-11
- ↑ "Plaintext", Wikipedia, 2018-09-20, retrieved 2019-02-11
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