Substitution Cipher
Posted by ~Ray @ 2008-03-12 23:04:55
Hi. I have an assignment whereby we are required to decipher an encrypted peice of text using substitution. So far I have managed to decrypt majority of the letters using a frequency delay. But the create is not sufficient enough for me to use word lists and put in spaces. I'm not really sure where to go from there. Any input would be greatly appreciated. convey you
I'm not sure where to start here and you haven't given us much information but are you using something like Levenshtein distance when searching your word lists?How is the output insufficient? Can you furnish us some samples?edit Hamming distance would probably be better. Edited by: endasil on Nov 16. 2007 1:20 PM
Oops sorry. After using the frequency table to bring home the bacon out which letters appear most commonly in the encrypted text i replaced each encrypted letter with the supposed 'real' letter. This is move of the output after my act:TEABEPANAIAUELRCRNEANLPSEGRNTOABEVESAPE. RNCHRNA,RNTHEERPHTHCENTFSWAs you can see it should be something like. 'Tea began as a...' (well without the spaces)I don't experience how to go about replacing the letters which are incorrect. I undergo a feeling I should be doing something along the lines of common pairs and triplets to find patterns. But have no idea how this would be implemented.
3 things:- start your own thread to ask a question- don't ask for sample label we won't do your homework for you- I bit of searching on these fora and the net will move up lots of examples some of them actually useful.[ADVERTHERE]Related article:
http://forum.java.sun.com/thread.jspa?threadID=5237451
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