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LEAP (Lightweight Extensible Authentication Protocol)


Show me everything on Mobile Authentication and Encryption

DEFINITION - LEAP (Lightweight Extensible Authentication Protocol) is a Cisco-proprietary version of EAP, the authentication protocol used in wireless networks and Point-to-Point connections. LEAP is designed to provide more secure authentication for 802.11 WLANs (wireless local area networks) that support 802.1X port access control.

LEAP uses dynamic Wired Equivalent Privacy (WEP) keys that are changed with more frequent authentications between a client and a RADIUS server. WEP keys are less likely to be cracked -- and less long-lived if cracked -- due to this frequency.

However, LEAP's reliance upon a version of the MS-CHAP protocol means that user credentials may not be adequately protected. More stringent authentication protocols employ a salt (a random string of data that modifies a password hash).

Cisco, Microsoft and RSA Security are promoting a more secure version of EAP, Protected Extensible Authentication Protocol (PEAP), as an Internet standard. That protocol is expected to displace LEAP.

Learn more about Mobile Authentication and Encryption
Podcast: The truth about network security and mobile device access: Lisa Phifer dispels some common misconceptions about network access, authentication, control, and over-the-air security for mobile laptops, PDAs, and smart phones.
Access on the road: Putting hotspot security to the test: Lisa Phifer and Craig Mathias outline a number of steps that mobile users can take to protect themselves while working in hotspots.
"Mobile Computing," Chapter 18: Security issues in mobile computing: This chapter discusses different techniques to secure information over mobile computing environments.
Stolen laptops are only the beginning: Stolen laptops pose great risks to the enterprise. Learn how identity management can help in protecting information and corporate resources.
Is a Microsoft VPN tunnel established through a WEP encrypted access point secure?: ITKnowledge Exchange member "Jeremy54" had a question Wireless and VPN and our resident wireless guru, Lisa Phifer offered her advice. Here is the Q&A.

LAST UPDATED: 24 Jul 2008

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More resources from around the web:
- TechRepublic's Ultimate Wireless Security Guide includes an introduction to LEAP.
- Lisa Phifer differentiates between PEAP and LEAP.





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