CREATE YOUR OWN CIPHER

Make up a message using a cipher and post it as a comment. Classify the message as either easy to decipher or hard. Easy messages should take less than 30 minutes to decipher whereas hard ones could take 1-2 hours. The message must be long enough to decipher and needs to contain sufficient clues to what the underlying cipher is. Of course, you would not do this if the message is confidental.

Ways you can give clues include:

1. Repeating words of 2-3 words that we use frequently, ie., the in is
.
2. Having words in which letters are repeated, ie., moon attach traffic

3. Putting gaps between the words in a sentence

When you have deciphered the message PLEASE ANSWER IN CIPHER - otherwise the enemy will get you. The cipherer can announce to the world your deciphering brilliance.

Below are some types of ciphers. The first are the easiest to encipher and decipher. Click on each term to get some information about each type of cipher.

CONSTANT 1 : 1 MAPPING (includes alphabet shift)
VARIABLE 1:1 MAPPING
CONSTANT 1: MANY MAPPING
VARIABLE 1: MANY MAPPING

PLEASE NOTE THAT THIS POSTING IS STILL BEING CREATED

Anyone...

Submitted by Brian Grady

... even doing anything with this challenge? I suppose I'll have to start the trend...

I like to attend to this

Submitted by haw

I like to attend to this seminaras in holydays.
regards,
SEO

Easy...

Submitted by Brian Grady

HN XQUBQIPN NYBQIPN NPE WYXW QB NPE KSWWQMP WQB QB NPE LHKC FQOO WE UENYBHNEU. YSNMQUE NPE WSM UELYN NPEKE QM H XHB JYS NHOC NY ZYK XYKE QBZY. PE FQOO WE FEHKQBI H WOSE WYFOEK PHN HBU WE EHNQBI H CEWHW.
(A fellow agent informs you that one, and only one, of the letters is the same in clear as in the message.)

A Cipher

Submitted by Wild Kid Nick

Thanks Brian - I have neglected completing this challenge (ie., putting in my examples).

Looking at your cipher, it looks like an alphabet shift (with one letter having a zero shift). This suggests that the amount of shift is not the same for all letters (if E is e then it clearly does not shift by n (ie., 3) and therefore, there must be a second letter that also does not shift by a common amount as letter position + n can not equal E as it already equals another letter.)

According to my scheme above your cipher is CONSTANT 1:1 MAPPING one (ie., letter * always equals letter ^).

I'd have a go at deciphering your message but I think its aimed at Christopher, Caleb, & Brian or some other peer.

Very Hard!!!!!!

Submitted by Christopher Jury

Try chewing on this one,

3C1516E141!19A113!2C142E1017B1116#1020!2DE93!9D16!11A17!
1UA10U3!18A16B145E11!156DE93!811BB!9A1B9!14EB!A115D917B!
14C15#3D!9E1516!4BB!3A!9C4B14!C115B11CDE15#18DD9!514B11A3B15!
10DD!3A!BBC14U!18DD3!114EB26B14!2A15!920C115#3CB!9C3!14EB!
4B113!10A!3C10B#

(Ignore any spaces)

Officially Signed and Most Graciously Authenticated, His Most Imperial Majesty, Kaiser Christophe Wilhelm XII, by the grace of God.

exclamation marks

Submitted by Wild Kid Nick

Given the number of !s the message must be very important or intense. More seriously I don't have time to study it now. (Glancing back I see it's something to do with the BBC) but will have a go later.

May I suggest that within 2 days if you haven't had any deciphering attempts you offer a hint. (This also goes for anyone else putting up a cipher - you hints will then help us appreciate how clever you are & guide us in developing our deciphering skills.

Hint

Submitted by Brian Grady

I have had no sign of anyone attempting to solve mine, so: The word 'kebab' is somewhere in the last sentence, and the first sentence mentions something smelly.