I seem to have picked topics for my work that have had a natural appeal for conference organisers and others. I have spoken at NATO Headquarters in Belgium, to the RSA conference in Singapore and at the Certicom conference in San Jose. I have also worked with companies like Network Associates and organisations such as the Smithsonian, Bletchley Park, Cambridge Alumni and First Tuesday. This has meant that I have lectured to audiences in Las Vegas, India, Australia, Germany and pretty much everywhere else.

Nowadays, I have less time for lecturing and traveling, but please email me if you want to find out if I am available.

The topics I tend to talk about are listed below:

• Fermat’s Last Theorem
• Science/Maths and the Media
• Libel and Libel Reform
• Skepticism
• Cryptography – the Science of Secrecy
• The Enigma Cipher (including Second World War Enigma machine)
• Probability, Chance, Risk and Gambling
• Alternative Medicine
• Big Bang – the history of the universe