| Publisher | Association for Computing Machinery | ||
|---|---|---|---|
| Format | 221.7KB PDF | Date added | 20 Oct 2005 |
| Topics | Wi-Fi (802.11), Network Security | ||
| Downloads | 171 | ||
This paper presents a practical key recovery attack on WEP, the link-layer security protocol for 802.11b wireless networks. The attack is based on a partial key exposure vulnerability in the RC4 stream cipher discovered by Fluhrer, Mantin, and Shamir. This paper describes how to apply this aw to breaking WEP, our implementation of the attack, and optimizations that can be used to reduce the number of packets required for the attack. It concludes that the 802.11b WEP standard is completely insecure, and it provides recommendations on how this vulnerability could be mitigated and repaired.
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