The IT sector is a key driver of the European economy, with 60% of Europeans using the internet regularly and 87% owning mobile phones. In 2009, Europe had the largest broadband market worldwide. However, cyber attacks have increasingly threatened internet security and the European economy. In 2007, Estonia suffered a massive cyber attack affecting government, banking, media and other services through techniques ranging from simple ping commands to sophisticated distributed denial of service attacks coordinated using botnets of compromised servers around the world.