HP Deskjet 6840 Color Inkjet Printer - Manual (Page 27)

Authentication type Description Benefits Limitations
Shared Key
Devices use a
shared master
secret to identify
themselves as
authorized
members of the
network.
Convenient to use in
conjunction with
WEP, since a WEP
key can serve as the
shared
authentication key.
All devices must
have the key.
The shared key
does not change
automatically.
WPA/PSK
Devices use a
single pre-shared
key (PSK) to
identify
themselves as
authorized
members of the
network and to
generate an
encryption key.
The pre-shared key
and the encryption
keys are not
identical.
Allows smaller
networks to use
WPA without the
need for an
authorization
server.
All devices must
have the key.
Encryption
Definition
Encryption involves using a password to encode data sent over a wireless network
in order to make the data unintelligible to eavesdroppers. Only devices that know
the password can decode the data.
Types of encryption
The printer supports four types of encryption. Each type of encryption has its
benefits and limitations.
Encryption type Description Benefits Limitations
Open System
Devices on a
network do not
encrypt data.
Least complicated
strategy.
Provides no
protection against
eavesdroppers.
HP Deskjet 6800 series printer
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