| Welcome to Crypto. We hope you enjoy your visit. You're currently viewing our forum as a guest. This means you are limited to certain areas of the board and there are some features you can't use. If you join our community, you'll be able to access member-only sections, and use many member-only features such as customizing your profile, sending personal messages, and voting in polls. Registration is simple, fast, and completely free. Join our community! If you're already a member please log in to your account to access all of our features: |
| A Fortunate Investment (challenge); Hard | |
|---|---|
| Topic Started: Jul 25 2007, 08:53 AM (293 Views) | |
| Revelation | Jul 25 2007, 08:53 AM Post #1 |
Administrator
  ![]](http://209.85.122.85/static/1/pip_r.png)
|
This challenge is based on the idea of hiding messages in spam (this form of encryption is discussed elsewhere). In the late nineties when communication through computers reached the big mass, a splinter fraction of the CIA set up a system to communicate with their agents in the field. To do this unnoticedly, they set up a fake company that spreads "commercial e-mail" for them, in other words spam, to a large number of people. In the list of receipients they put the web mail adresses of the agents. On the other hand of course, the agent cannot use the company's server to send mails. This is where one field agent makes a mistake. In a hury, he made a spam mail too, but he failed to send it to a large group. That's when the French Bureaux Deuxième comes in. They intercepted the following message:
Can you crack it for them? |
|
RRRREJMEEEEEPVKLWENFNVJKEEEEEAOLKAFKLXCFZAASDJXZTTTTTTTLSIOWJXMOKLAFJNNKFNXN RAGRBAQEMHIGDJVDSEOXVIYCELFHWLELJFIENXLRATALSJFSLCYTKLASJDKMHGOVOKAJDNMNUITN RRRRLJVEEEEECLYVYHNVPFTAEEEEEMWLMEIRNGLARWJAKJDFLWNTIERJMIPQWOTZEOCXKNUBNXCN RJIRPOWEANFUSNCZVDVZNMSFEKLOEPZLDKDJWSAAAAAAAOERHJCTNCKFRIMVKSOFOMKMANREWNBN RZUDRGXEEEEENFQIDVLQNCKNEEEEEDGLLLLLLAWIOSNCDARLODMTOEJXMILDFJROTKJSDNLVCZNN | |
 |
 
|
| Revelation | Jul 29 2007, 09:57 PM Post #2 |
|
Administrator
|
Since this challenge might be hard, I am posting some hints now. The thing you most likely want to know is that the 'cipher' is very basic, so nothing like Vigenère or Playfair. Hint about the length: *SPOILER* The message consists of a few words *END SPOILER* General hint: *SPOILER* Search the spam for hints, be creative! *END SPOILER* Hint about the cipher for beginners (this quite spoils it for advanced members): *SPOILER* It is a simple addition, so A+B=C (1+2=3). Now you have to find a key *END SPOILER* Additional hint for beginners (this quite spoils it for advanced members) *SPOILER* Search the bible for the key, and again, be creative! *END SPOILER* |
|
RRRREJMEEEEEPVKLWENFNVJKEEEEEAOLKAFKLXCFZAASDJXZTTTTTTTLSIOWJXMOKLAFJNNKFNXN RAGRBAQEMHIGDJVDSEOXVIYCELFHWLELJFIENXLRATALSJFSLCYTKLASJDKMHGOVOKAJDNMNUITN RRRRLJVEEEEECLYVYHNVPFTAEEEEEMWLMEIRNGLARWJAKJDFLWNTIERJMIPQWOTZEOCXKNUBNXCN RJIRPOWEANFUSNCZVDVZNMSFEKLOEPZLDKDJWSAAAAAAAOERHJCTNCKFRIMVKSOFOMKMANREWNBN RZUDRGXEEEEENFQIDVLQNCKNEEEEEDGLLLLLLAWIOSNCDARLODMTOEJXMILDFJROTKJSDNLVCZNN | |
|
|
|
| Revelation | Oct 1 2007, 06:54 PM Post #3 |
|
Administrator
|
Do you need some more help? I really want someone to complete this! New spoiler for the people with little time: Focus on the noise (and read the first two hints) |
|
RRRREJMEEEEEPVKLWENFNVJKEEEEEAOLKAFKLXCFZAASDJXZTTTTTTTLSIOWJXMOKLAFJNNKFNXN RAGRBAQEMHIGDJVDSEOXVIYCELFHWLELJFIENXLRATALSJFSLCYTKLASJDKMHGOVOKAJDNMNUITN RRRRLJVEEEEECLYVYHNVPFTAEEEEEMWLMEIRNGLARWJAKJDFLWNTIERJMIPQWOTZEOCXKNUBNXCN RJIRPOWEANFUSNCZVDVZNMSFEKLOEPZLDKDJWSAAAAAAAOERHJCTNCKFRIMVKSOFOMKMANREWNBN RZUDRGXEEEEENFQIDVLQNCKNEEEEEDGLLLLLLAWIOSNCDARLODMTOEJXMILDFJROTKJSDNLVCZNN | |
|
|
|
| 1 user reading this topic (1 Guest and 0 Anonymous) | |
| « Previous Topic · Challenges · Next Topic » |
5:22 PM Nov 23
