It didn’t look like the redoubt of one of the most sought-after people on the planet. Overlooking the Macquarie Park cemetery in Sydney’s suburban North Ryde, the five-storey office building is typical of any low-rise business park. High concrete walls are punctuated with small windows, a wide lime stripe hinting half-heartedly at the modern.
But that’s where Australian Tax Office officers went on March 26, 2015. They were there to meet Dr Craig Wright, a computer scientist who was running several businesses from the address. Among them was CO1N, which claimed to use one of the world’s fastest supercomputers for research related to bitcoin.