Security will be a major focus this week at the giant Cebit show in Hanover, Germany. This year, the annual IT trade show will hone in on the multiple layers of security threats facing enterprise networks. Now it's not just data networks that are under attack; VoIP and even paper documents are at risk.

The flurry of security issues involving Apple's Mac OS X over the past few days once again hammers home the fact that no technology platform is invulnerable to attacks, whatever the perception might otherwise be, security analysts said.

If you use a Sony Ericsson Mobile Communications AB mobile phone, you may want to disable the Bluetooth function, the French Security Incident Response Team (FrSIRT) warned this week, saying a security vulnerability potentially puts the phones at risk to a denial-of-service (DoS) attack.