BlackBerry Enterprise Solution
85
Protocol
Description
Wi-Fi enabled BlackBerry
device implementation
TKIP TKIP
is
•
part of the IEEE 802.11i enterprise Wi-Fi network
security standard
•
designed to address the shortcomings in WEP
without requiring replacement of the existing
enterprise Wi-Fi network hardware
•
designed to use the RC4 encryption method (based
on improved WEP standards)
TKIP is designed to be more robust than WEP in the
following ways:
•
using a key size of 128 bits (compared to 40 bits or
104 bits for WEP)
•
using a modified initialization vector, that is
designed to significantly increase the difficulty of
deriving the WEP key
•
generating keys dynamically for each session by
changing keys automatically for each packet of
transmitted data (where WEP uses a single fixed
key for an entire session)
•
using a MIC that fails and discards transmitted
packets that are captured, altered, and resent
•
requiring a secure method of distribution to a
wireless client
The Wi-Fi enabled BlackBerry
device supports the use of TKIP
with
•
EAP-TLS
•
EAP-TTLS
•
EAP-FAST
•
PEAP
•
PSK
AES-CCMP AES-CCMP
is
•
part of the IEEE 802.11i enterprise Wi-Fi network
security standard
•
designed to use AES encryption
AES-CCMP is designed to provide a robust security
protocol similar to TKIP in the following ways:
•
using a key size of 128 bits
•
using a MIC that fails and discards transmitted
packets that are captured, altered, and resent
•
requiring a secure method of distribution to a
wireless client
The Wi-Fi enabled BlackBerry
device supports the use of AES-
CCMP with
•
EAP-TLS
•
EAP-TTLS
•
EAP-FAST
•
PEAP
•
PSK
EAP authentication methods and encryption algorithms with which the BlackBerry device
supports the use of CCKM
The Wi-Fi enabled BlackBerry device supports the use of CCKM with
•
all EAP authentication methods that the Wi-Fi enabled BlackBerry device supports
•
WEP and TKIP
The Wi-Fi enabled BlackBerry device does not support the use of CCKM with
•
the Cisco CKIP encryption algorithm
•
the AES-CCMP encryption algorithm
©
2009 Research In Motion Limited. All rights reserved.
www.blackberry.com