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You are here: Home / Marketing & Tech / Invitation from the FBI

Invitation from the FBI

December 30, 2008 by Cotton Rohrscheib Leave a Comment

Here’s something you don’t see everyday, the FBI has issued an invitation to hackers or just anyone interested in cracking codes to break a cipher they have placed on their website.  The code was generated by the FBI cryptanalysts. 

They have even posted some primers for newbies out there that are interested and want to try their skill and patience. So, if you are looking for something fun to do over what’s left of the holiday break, you might want to check this out.  I think that there were several thousand responses to their code last year…

Found this on Brightkite:

The FBI today challenged anyone in the online community to break a cipher code on its site.  The code was created by FBI cryptanalysts. The bureau invited hackers to a similar code-cracking challenge last year  and got tens of thousands of responses it said.

A number of sites host such cipher challenges, including this one at the University of South Hampton.

The FBI offers a few primers on the subject including:

A relatively basic form of substitution cipher is the Caesar Cipher, named for its Roman origins. The Caesar Cipher involves writing two alphabets, one above the other. The lower alphabet is shifted by one or more characters to the right or left and is used as the cipher text to represent the plain text letter in the alphabet above it.

In this example, the plain text K is enciphered with the cipher text L. The phrase ‘Lucky Dog’ would be enciphered as follows:

Plain Text: L U C K Y D O G

Cipher Text: M V D L Z E P H

Ciphers can be made more secure by using a keyword to scramble one of the alphabets. Keywords can be placed in the plain text, the cipher text, or both, and any word can be used as a key if repeated letters are dropped. Here the word SECRETLY (minus the second E) is used as the plain text keyword.

The FBI of course doesn’t always invite folks to break code on its site. In fact last spring a consultant managed to access the bureau’s National Crime Information Center database.

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About Cotton Rohrscheib

The Cotton Club is a monthly podcast hosted by me, Cotton Rohrscheib. I'm a 52 year old entrepreneur w/ ADHD, OCD (and now AARP) that refuses to grow up as I grow old. I have collaborated and invested in hundreds of projects throughout my career in multiple industries such as; technology, healthcare, and agriculture. I also have 25 years experience in the marketing industry as a co-founder of an award-winning advertising agency. I will undoubtedly cover a wide variety of topics on my podcast while sharing some really crazy stories and situations that I've been fortunate to witness firsthand. I also have a book coming out in 2025 titled, "Mistakes were Made"

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