Cryptography is a quintessential part of computer security in the modern world. Whenever you buy something on eBay or log into Facebook, that data is encrypted before it's sent to the server in order to prevent third parties from eavesdropping and stealing your sensitive information.
There are so many hackers around these days, and they are becoming very smart. So smart that they have successfully taken down many government websites. The most recent attack was on the Department of Justice (DOJ). To read about the history of these hackers, check out Wikipedia.
In 1988, John Langley created COPS for the fledgling FOX network. 23 years later, the show is still running. It is the Energizer bunny of prime time television. Since John has followed more police officers and witnessed more crime than any human being on earth (absolutely no question), I had to ask some advice for hypothetical unwanted encounters with the men in blue.