gilgamesh said:Stebet said:*snip*There is more to the puzzle:
1. Convert the base 64 into binary and obtain the comic.
2. The comic has weird on/off bits on the edges that should be converted into binary.
3. The binary should be converted into ascii.
4. The ascii should be transformed with ROT13.
5. The resulting string is a URL of: https://cybersecuritychallenge.org.uk/834jtp.html
6. The URL contains hex string that is the 'Real' code to be broken.
7. Use substitution and frequency analysis on two-letter combination of the alpha-numeric code... i.e. ac=E
8. The resulting message is below, I omitted the code that you are supposed to send.
C O N G R A T U L A T I O N S ! Y O U ' V E F O U N D A N D C O M P L E T E D T H E R E A L C H A L L E N G E . Y O U R W I N C O D E I S (OMITED BY ME) P L E A S E E M A I L T H I S C O D E T O O U R T E A M A T M E D I A @ C Y B E R S E C U R I T Y C H A L L E N G E . O R G . U K . I F Y O U ' R E T H E F I R S T P E R S O N T O D O S O , A N D C A N P R O V E Y O U M E E T T H E E L I G I G I L I T Y C R I T E R I A ( B R I T I S H C I T I Z E N C U R R E N T L Y R E S I D E N T I N T H E U K ) W E W I L L G E I N T O U C H T O A D V I S E H O W T O C L A I M Y O U R P R I Z E . W E L L D O N E A N D G O O D L U C K I N T H E C Y B E R S E C U R I T Y C H A L L E N G E C O M P E T I T I O N S T A K I N G P L A C E T H R O U G H O U T T H E R E S T O F T H E Y E A R .
I am not eligible for the contest, so I did not send.
Nice job! I didn't notice the edges, I figured them for jpeg artifacts since I imagined they'd have to really compress the image. Very interesting.
