6-342-30-2-132 / 420-72-30 / 12-240-20-30 / 420-240 / 342-30-506-30-2-156 / 2 / 42-2-182-240-462-380 / 272-72-342-2-380-30 / 2-210-20 / 90-420-380 / 2-462-420-72-240-342:

420-240 / 6-30 / 240-342 / 210-240-420 / 420-240 / 6-30; 420-72-2-420 / 90-380 / 420-72-30 / 306-462-30-380-420-90-240-210.

~552-90-156-156-90-2-182 / 380-72-2-132-30-380-272-30-2-342-30

Note: Each letter of every word is separated by a dash and each word is separated by a slash.

(In reply to An unusual approach by draistal)

Frequency analysis is a very well known cryptographic technique. Interestingly, I was taught (as a schoolboy...) some very important rules that remain absolutely valid:

If you want a code to remain secure:

change your substitution key after every 22 letters, not more.

regroup the cypher text into blocks of 5 letters.

these two rules on their own almost entirely defeat your (otherwise completely reasonable) analysis.

Posted by Hew BG on 2004-07-16 09:29:19