This presentation was given at the Over The Air event #ota11 at Bletchley Park. The idea was to get developers thinking about how they are securing their applications (or not) and to have an open discussion about methods that could be employed to help developers. Julius Caesar was nearly defeated a few times and had his codes have been broken, just maybe, the world might have been a different place. For more information on the individual battles (I did a verbal run through, check out the great wikipedia pages on them). The code breaking exercise contained within is a fun tool to help people understand about the need to protect information.