A new security report published today by IBM predicts and epidemic of viruses and worms attacking cellphones, wireless networks and handheld devices as well as computers in cars and satellite communications systems.

According to the report, worms and viruses attacked corporate networks most frequently in 2004, but late in the year, an increasing number of viruses and worms were targeting PDAs and other mobile devices.

'After a year like 2004, many IT departments feel beaten down from combating viruses like Mydoom and NetSky,' said Stuart McIrvine, IBM's director of security strategy.

Personal Digital Assistants and cellphones are also expected to have an increase in spam this year along with numerous copycat viruses and other problems. It should keep the antivirus people very busy this year.