Without An Authentication Server; Encryption - HP jetdirect 175x Administrator's Manual

Without an Authentication Server

For small office networks that do not have an authentication server,
HP Jetdirect wireless print servers support network authentication
using Extensible Authentication Protocol with a Pre-shared key
(EAP/PSK). Using a pass-phrase entered by the user, the print
server generates a pre-shared key used for network access and
communications.
When configured for EAP/PSK authentication, the print server uses
Wi-Fi Protected Access (WPA) dynamic encryption protocols for
wireless communications.

Encryption

HP Jetdirect 802.11b wireless print servers support static WEP
(Wired Equivalent Privacy) encryption. For static WEP encryption,
a network WEP key of fixed length (40/64-bit or 104/128-bit) is
shared by each device on the network.
Depending on your wireless print server model, the following
dynamic encryption protocols are supported:
G dynamic WEP
G
Wi-Fi Protected Access (WPA)
Note
When dynamic encryption is used, encryption keys are periodically
changed automatically and provide enhanced security because they
will likely change before someone can decipher them.
In dynamic WEP encryption, each device on the wireless network
is assigned a different encryption key that expires at preset
intervals and is then replaced.
WPA encryption is an enhanced version of dynamic WEP and offers
improved security. For example, new encryption keys are generated
for fixed amounts of data (10 kilobytes) transmitted by a device on
the network.
ENWW
If not supported by your HP Jetdirect wireless print
server, EAP/PSK authentication and Robust
encryption will not be displayed as a selectable
configuration option.
Introducing the HP Jetdirect Print Server 13