Back in November 1988, Robert Tappan Morris, son of the famous cryptographer Robert Morris Sr., was a 20-something graduate student at Cornell who wanted to know how big the internet was, that is, how many devices were connected to it. So he wrote a program that would travel from computer to computer and ask each machine to send a signal back to a control server, which would keep count.
The program worked well, in fact it worked too well.
Defenx, founded in 2009 and listed on the London Stock Exchange (LON: DFX), is an up-and-coming company in the mobile security sector which offers a wide range of solutions for the protection of smartphones, desktop PCs and laptops.