US private equity firm Thoma Bravo is adding Sophos Group to its cybersecurity stable, announcing a buyout deal that values the British maker of antivirus and encryption products at $3.8bn (€3.4bn).

James Silver asks the experts for their top tips on keeping the cyber fraudsters at bay.

WIKILEAKS supporters are downloading increasing amounts of the spam -shooting software used to attack companies seen as hostile — a development that could challenge even internet giants such as PayPal and Amazon.com during the crucial Christmas shopping season.

Wikileaks supporters are downloading increasing amounts of the spam-shooting software used to attack companies seen as hostile - a development that could challenge even internet giants such as PayPal and Amazon.com during the crucial Christmas shopping season.