You just find a business card of someone working at DenyAll, a wonderful software editor delivering state of the art application security solutions.  It sounds promising…

 

Fortunately, you know an application security expert working at DenyAll. You make a quick tour inside DenyAll’s headquarter office and keep your eyes well opened.

 

You come upon the Connect room. Well, well, it looks like the marking on the business card!

 

You enter the meeting room, and find some paper balls in the trash…

 

Curiosity killed the cat… You still open the ball papers and discover the following messages:

 

Transcript of the ball papers:

-----BEGIN RSA PRIVATE KEY-----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-----END RSA PRIVATE KEY-----

Encrypted message

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

It is a crypted message that contain clues to win an entrance ticket to La Nuit du Hack. With your cryptography eyes, you directly notice that the message is crypted like this:

  1. RSA encryption in 2048 bits
  2. Double Base64 encoding
  3. Hexadecimal encoding

So easy! Be one of the five first ones to decrypt the message and win an entrance ticket to La Nuit du Hack.