Viewing Single Post From: My New Cipher

Viewing Single Post From: My New Cipher
Paarth Dave	Apr 15 2008, 07:17 AM
Advanced Member Posts: 70 Group: Members Member #2,712 Joined: March 26, 2008	Hello Guys, This is my cipher on which I am working. I have named it "Catastrophe". It works as follows:- Suppose the plaintext is "CATASTROPHE", the conversion of this word in numericals will be... 03 01 20 01 19 20 18 15 16 08 05 This conversion is according to the value of A being 01 but the next part includes conversing alternate numbers according to the value of A being 02 starting from the second letter. So the modified conversion is 03 00 20 00 19 19 18 14 16 07 05 Now I will rearrange these numbers from last to first including the swapping of the indices. So the arrangement will be as follows:- 50 70 61 41 81 91 91 00 02 00 30 Now let's take a keyword - "1.25" Taking the first part of the keyword and adding its multiples with their swapped indices to the alternate numbers starting from the first. For eg. The first part of the keyword is 1. So its multiples are as follows..1,2,3,4,5,6,7,8,9... Now swapping their indices...10,20,30,40,50,60,70,80,90.... Now adding them.. 50 70 61 41 81 91 91 00 02 00 30 + 10 20 30 40 50 60 _________________________________ 60 70 81 41 111 91 131 00 52 00 90 The other multiples are omitted as the limit is reached. Now taking the second part of the keyword - 25 and repeating the above process but starting from the last.. 60 70 81 41 111 91 131 00 52 00 90 + 521 001 57 05 52 _____________________________________________ 60 591 81 042 111 148 131 05 52 52 90 Now modifying it & removing useless numbers... 60,591,81,42,111,148,131,5,52,52,90 And the presentation of this final ciphertext would be as follows:- Time :- 1:25(the keyword) 60,591,81,42,111,148,131,5,52,52,90 Having a first look at this seems that this is a book cipher. Advanced cryptanalysis with representing these values on a frequency polygon reveals that frequencies keep on varying.. For eg. Let's take the first 5 digits of the ciphertext. 60,591,81,42,111 Observe that the frequencies once go up and then down & again up & then again down.. Now, let's have a challenge for you all.... Time:- 15:05 91,40,83,60,54,10,6,118,97,9,90,106,532,57,102,145,573,15,81,105,662,54,102,64,522,13,113,104,532,34,143,142,612,21,132,130,594 Note: Spaces are not encrypted.
	Cryptography Vanquished....

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