cryptography
Today's digital world with its free flow of information, would not exist without cryptography to guarantee our privacy. Plus meets mathematician, author and broadcaster Simon Singh to find out about the science of secrecy.
The Riemann Hypothesis is probably the hardest unsolved problem in all of mathematics, and one of the most important. It has to do with prime numbers - the building blocks of arithmetic. Nick Mee, together with Sir Arthur C. Clarke, tells us about the patterns hiding inside numbers.
Fame, glory, and more importantly prizes are on offer in the National Cipher Challenge.
Crack codes, solve a mystery and even win prizes in the University of Southampton's National Cipher Challenge.
