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Appendix G. Wireless network environment 49
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PEAP (Protected Extensible Authentication Protocol)
: PEAP uses digital
certificates for network server authentication and a password for client
authentication.
WPA (Wi-Fi Protected Access)
WPA, announced by Wi-Fi Alliance, authorizes and identifies users based on a
secret key that changes automatically at regular intervals. WPA uses 802.1x or
WPA-PSK (WPA mode Pre-Shared Key) for authentication. WPA-PSK verifies
users via a pre-shared key on both a client station and an access point. In WPA-
PSK authentication, a client may only gain access to the network if the client's
password matches the access point's password. WPA also uses TKIP (Temporal
Key Integrity Protocol) and AES (Advanced Encryption Standard) for data
encryption.
Certificates
Certificates are used to validate the identity of clients and network servers and
allow encrypted data communications for EAP/802.1x authentication.
Certificates may be issued and signed by a trusted third party, called Certificate
Authority (CA). In EAP/802.1x authentications, such as EAP-TLS, EAPTTLS,
and PEAP, the dell network print server may require one or both of the following
certificates:
•
Root Certificate
: A certificate from a trusted Certificate Authority (CA) is
used to validate the identity of a network authentication server while EAP
authentication methods, such as EAP-TLS, EAP-TTLS, and PEAP, are
performed. The network authentication server's identity will be validated
when the root certificate information installed on the network print server
is identical to the information on a certificate received from the network
authentication server, such as RADIUS. To be installed on the Network
Printer Card, a root certificate must be in the form of Base64 Encoded
X.509 with a .cer extension and be less than 3,072 bytes.
•
Client Certificate
: A client certificate is used to validate the identity of
the Network Printer from a network authentication server, such as
RADIUS, while the EAP-TLS authentication method is performed. To be
installed on the Network Printer, a client certificate must be in the form of
PKCS #12 / Personal Information Exchange with a .pfx extension and be
less than 3,072 bytes.