wi-fi security?

[Brian]

On Thu 06 Aug 2009 at 10:53:05 -0300, Derek Broughton wrote:

>                                      but the basic security on the transport 
> should be WPA (which is crackable, too, but considerably harder than WEP).

This is not the first time I have seen a reference to WPA being crackable but
I've yet to see techniques (as one gets with WEP) detailing how it is achieved.
Does 'considerably harder' involve a time frame of tens of thousands of years
when a strong passphrase is used?