Wireless Networks Encryption

["alex hajii" <xenix1989 () hotmail com>]

new wireless networks support encryption, so that messages cannot be 
sniffed.
does anybody know more info on this ?
I mean:

- what encryption protocol do they use (I thing PGP) ?
- exactly how is the hand shake implemented ?
- do all clients receive the same public key ?
- is it true that keys change each time a network device gets connected to 
the network ?


thank U



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