about substitute teacher
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- Posts: 23
- Joined: Tue May 27, 2008 10:05 am
- Location: Rockville
As the name of the challenge suggest, it uses a simple substitution cipher (http://en.wikipedia.org/wiki/Substitution_cipher)
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- Posts: 23
- Joined: Tue May 27, 2008 10:05 am
- Location: Rockville
Basic
The basics of crypto (and by basics I mean you should have figured that out on you're own) is to know english
What I mean is that there are only a few common 2 or 3 letter words therefore you could start off by replacing small words first by guessing and then bigger words
You should get something eventually
Another key when dealing with harder encryptions (XECryption is my favorite) is remembering what are the most common used letters (and characters) and what they can be associated with (Hex, Bin, HTML...)
Hope it helps
What I mean is that there are only a few common 2 or 3 letter words therefore you could start off by replacing small words first by guessing and then bigger words
You should get something eventually
Another key when dealing with harder encryptions (XECryption is my favorite) is remembering what are the most common used letters (and characters) and what they can be associated with (Hex, Bin, HTML...)
Hope it helps
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- Joined: Mon Jul 14, 2008 9:52 pm
- Location: England
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- Posts: 4
- Joined: Wed Aug 06, 2008 11:23 pm
I solved all of the cyphers so far by knowing all of the codes contain the word "answer." I then find all of the 5 letter words in the code and substitute it in (usually there is only a few). If the five letter coded word has a three letter coded word in front of it, I would guess that the word is "the" and double check it with the coded word that means "answer" to see if the "e"s match up.
Hope this gives you a big push in the right direction!
Hope this gives you a big push in the right direction!
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- Posts: 8
- Joined: Sat Nov 01, 2008 2:49 pm
http://en.wikipedia.org/wiki/Substitute:
-> "Substitute means to replace one thing with another." <-
The most frequent character in the English language is the 'e' !
-> "Substitute means to replace one thing with another." <-
The most frequent character in the English language is the 'e' !