New virus seeks 'ransom' for computer files Wed Mar 15, 12:56 PM ET WASHINGTON (AFP) - In the equivalent of a holdup in cyberspace, a new computer bug locks up a user's file with encryption and demands a 300-dollar "ransom," security experts say. The so-called "ransomware" Trojan was discovered Saturday by the security firm LURHQ, which said it was based on a similar scheme perpetrated 15 years ago. Users whose computers are infected receive an e-mail stating that their files have been encrypted and will not be unlocked unless they transfer 300 dollars to a special account. In poorly written...