Gruss Gott wrote:
> My wording was off, I meant that there are 2 types of WPA, not that
> Personal was better Enterprise.  My Mac has the following choices:
> 
> WEP (3 types: password, 40/128 Hex, 40/128 ASCII)
> LEAP
> WPA (2 types: Personal and Enterprise)
> 
> I went with the WPA Personal as it seemed like most secure choice.  My
> PSK is long phrase that is 20+ characters with mixed characters and
> numbers.

>From the offered choices, WPA Enterprise is the best. LEAP is about as safe as 
>WPA Personal (it has the same dictionary attack issues) and WEP is the worst.

WPA Enterprise uses the same mechanism as 802.1x: pass the credentials on to 
the RADIUS server and have the RADIUS server authenticate them. That means you 
can use many different authentication schemes, even in a roaming network: it is 
in fact a whole class of solutions (LEAP, EAP-TLS, PEAP, EAP-TTLS, EAP-MSChap, 
EAP-MSChapV2 etc.). It is not very suited for personal use, few people run a 
RADIUS server, but ideal for the enterprise where people just tie their RADIUS 
server into a user database.

WPA Personal (PSK) uses the same methods for encrypting the air channel, but 
the method for the initial authentication is weaker. You can only set up one or 
a few pre-shared keys and the per-user keying that works with RADIUS and a 
central user database doesn't work with PSK. So not only will the same key be 
used more often (reducing entropy), more people will share the key.

Jochem

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