Analyzing the new portable console from Sony, http://blogs.zdnet.com/Ou/?p=56, George Ou has discovered some security problems.

It seems the new console does not comply with WPA security standard, and it uses WEP, an older set of ciphering protocols.

George Ou says the WEP standard was abandoned on 2003, and Wi Fi Alliance recommended that all wireless products should include WPA.

Sony's product does not comply with these requirements, and consequently, the only way you can connect the device to a wireless network is to change the security settings.
Hence, networks which have a PSP connected are much easier to attack and the other equipments are also more vulnerable to hackers.

Sony admitted the problem and promised a firmware upgrade which will make the transition to WPA, but for now, such an upgrade is not available.

PSP hasn't been launched yet in Europe, only in Japan and in the United States, where home wireless networks are very numerous.

As PSP sales are increasing, the likelihood of such a device to be present in every wireless network is very high.

Until Sony repairs the problem, PSP is a security breach in a network.