Hand Held Products Dolphin 9500 User Manual page 163

Dolphin 9500 series
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Cisco LEAP
The message exchange used by Cisco LEAP is proprietary. This protocol is not a standard EAP type, but is supported by the
Client through a licensing arrangement with Cisco.
Relative Merits of Authentication Protocols
MD5 is the least secure of the EAP protocols as it only does a one-way authentication, and does not support automatic
distribution and rotation of WEP keys, increasing the administrative burden of manual WEP key maintenance.
TLS, while the most secure EAP protocol, requires client certificates to be installed on each wireless client. Establishing and
maintaining this PKI infrastructure is normally a burden most administrators do not feel is worth the extra level of security gained.
TTLS and PEAP bypassed the certificate issue by tunneling TLS, and thus eliminating the need for a certificate on the client side.
PEAP supports only EAP-compliant authentication protocols within the tunnel structure, and is rapidly becoming the most widely
supported of the EAP methods. TTLS supports pre-EAP authentication protocols within the tunnel structure, and should be used
in those circumstances when pre-EAP interior protocols are desirable.
LEAP is a pre-EAP, Cisco-proprietary protocol, with many of the features of EAP protocols. Cisco controls the ability of other
vendors to implement this protocol, so it should be selected for use only when limited vendor choice for client, access-point, and
server products is not a concern.
Differences Between Protocols
Security Feature
Client -side certificate required?
Server-side certificate required?
Dynamic WEP Re-keying
Mutual or One-way Authentication?
Support of non-EAP protocols within
a secure tunnel?
Relative Deployment Complexity
Relative Security
Dolphin® 9500 Series Mobile Computer User's Guide
MD5
TLS
Challenge
No
Yes
No
Yes
No
Yes
One-way
Mutual
N/A
N/A
Simple
Difficult
Poorest
Highest
TTLS
PEAP
LEAP
No
No
No
No
Yes
No
Yes
Yes
Yes
Mutual
Mutual
Mutual
Yes
No
N/A
Moderate
Moderate
Moderate
High
High
High
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