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Whether you've been hacked or suspect an employee of wrongdoing, knowing how to preserve evidence is crucial. Derek Parkinson reports. The open-source Ubuntu Linux project had to take five of its eight Ubuntu-hosted community servers offline after they'd been commandeered by hackers and were launching attacks. Unitrends CEO Duncan McPherson looks at how encryption has become an increasingly important technology for businesses. Unitrends CEO Duncan McPherson looks at how encryption has become an increasingly important technology for businesses. Along with the updates to Microsoft's Internet Explorer, Apple's Safari fixes, and the latest Opera patches, Mozilla has released its own security updates for Firefox. Strong authentication has improved dramatically since its earliest days. And now more than ever, that comes as good news for consumers. Trend Micro has detected a new DNS changing form of malware, which poisons other hosts on the local subnet installing a rogue Dynamic Host Configuration Protocol (DHCP) server on the network. The IT security vendor community came out in force today to warn consumers and corporate web surfers that internet criminals are likely to double their efforts over the Christmas season to infect machines and steal sensitive data. The United States central command was hit by an attack and affected computers in combat zones in the Middle East. The student charged with accessing former vice presidential candidate Sarah Palin's email will go to trial in April. Companies need to step up their ability to guess where cybercriminals will strike next. Security concerns over global malware epidemic. Google is the search engine of choice for both consumers and hackers, according to infosec experts. A 20-year-old Tennessee man has been indicted on charges he accessed GOP vice presidential candidate Sarah Palin's Yahoo email account without permission. Criminal gangs have acquired login details for more than 200,000 websites. The rate and complexity at which exploits are being "weaponised" is rapidly increasing. As the malware threat landscape continues to evolve, hackers are constantly changing techniques to counteract detection technologies vendors develop. US engineers have developed software that can be used with Windows and Linux systems to perform log-ins, digital signing and verification. Citect which this week came under fire for a vulnerability in its SCADA software, commonly used in critical infrastructure, has reassured its customers that a breach is extremely unlikely. A government laptop used by Secretary of Commerce Carlos Gutierrez may have been breached during a visit to Bejing last December.