Teacher give us three pictures which look the same. If you look it carefully, you can find that the three pictures are difficult size. Why? It’s at the beginning of treasure hunt.
At first, we know we can get something hidden in the pictures by use the software “OpenStego”. Yes, we get two files named “RANDOM”. We get a clue after opening the pdf file. That is “Secret word number 1 is pirate. Clue for next secret: you found that files can be hidden in graphics. You also realize that the name of a file is arbitrary. You can rename any file to any name and extension. There are two files you should have found named “RANDOM”. One is PDF or ‘portable Document Format’ (this file) and the other is a TrueCrypt Volume. The password for this TrueCrypt volume is ‘thisissecret’.” According to the clue, we can use software “TrueCrypt” open the other “RANDOM”. We do this and get the n Secret word number 2 is steganography.
Clue for next secret:The truecrypt volume RANDOM where you found this file also has a hidden volume. Open RANDOM with the password “thisisveryverysecret”. Then we use difficult password to decrypt “RANDOM” and get the next clue: Secret word number 3 is encryption. Clue for next secret: You found secret word number 1 in a file named RANDOM that was really a PDF file. This PDF file contains the last secret word hidden using the program wbStego4 and the password “lastsecret”. This hidden file is a very small text file that only contains one word. This one word is secret word number 4. Then we use wbStego4 open the PDF file and get the last keyword “ciphertext”.
We were happy when we had got the last keyword. It’s a interesting lesson and I like it.
