We found a secret message:
b jmrz wjzoz wjfyujwo, of fvwzh b fyujw wf czxqmtz wjmw oqfw nbwj njmw b fhtz gfyujw 'tmyoz oflzgfip owfqz lp tmc cmibf mhi hfn b ayow obw bh obqzhtz. obwwbhu bh obqzhtz ubrzo lz wjz wblz wf mii wf wjzoz qpcbto mhi qzmi pfy wf uf wf uf ifw foy ifw ziy oqmoj twu wjczz njbtj lmezo vfc m czmqqp gmi cjplz. ofccp! ayow gz uqmi nz ibih’w obhu bw…
It seems to be encrypted with a “substitution cipher”, meaning that someone changed each letter for some other letter. For example, “secret” might be “bxtvxw” if someone switched b for s, x for e, t for c, v for r and w for t. This would be hard to guess, maybe, but you can usually make some good guesses for longer messages if you look at what letters occur most frequently – these usually match up with the most frequent letters in normal english. You should also look at things like short words (a, I, of, so, to, at, the, was, saw…) and patterns (doubled letters in the “cipher text” will be doubled in the “plain text” – “zwwp” might be “look”, “book”, “tool” and so on)
These aren’t too hard to break, especially if you have some patience and good tools to help you.
You can use http://www.cryptoclub.org/tools/cracksub_topframe.php to help get the job done – good luck! Paste the message from above into that site, click the “crack” button, and have fun. The frequency table might help with some of your guesses for the most common letters. Enter your guesses in the key above: if you think that “A” in the cipher text is actually “B” in the plain text, then put “A” beneath “B” in the key – your translation will appear below.