Business users account for 57 per cent of malicious attacks while one in eight Australian IP addresses is hit by one or more Web attacks on any typical day, according to a Deakin and Macquarie University analysis of more than 200 million Web requests from Australian Internet users. The report – entitled Analysis of the Australian Web Threat Landscape and conducted by Deakin and Macquarie academics with the support of security vendor Trend Micro – reflects research that began earlier this year and has since used data analysis on a wealth of data provided on an opt-in basis by users of Trend Micro’s cloud-based security filtering services. The Australian Research Council-funded research is based on data collected during the first two weeks of May, during which devices representing 600,000 distinct IP addresses visited HTTP/HTTPS sites every day. Of 200 million requests analysed during the time, just 400,000 – from around 80,000 distinct IPs – were issued for access to malicious Web pages.