My slides from the fantastic Over The Air event at Bletchley Park are now up on slideshare, along with the solutions to the code breaking challenge within. If you have a spare few minutes, why not have a go? All the battles mentioned are on wikipedia if you want to look them up as I went through them verbally. Well worth a read to see how close Julius Caesar came to defeat, a few times. The mobile phone message in all of this is getting developers to secure their applications properly.