14 To add support for WPA or WPA2, some old Wi-Fi access points might need to be replaced or have their firmware upgraded.
10 Therefore, data can be more easily intercepted and decrypted with Shared Key authentication than with Open System authentication.
The client encrypts the challenge-text using the configured WEP key and sends it back in another authentication request.
17 It was hoped to eliminate the duplicate IV deficiency as well as stop brute force key attacks.
"802.11mb Issues List v12" (excel).In 2008, Payment Card Industry (PCI) Security Standards Councils latest update of the Data Security Standard (DSS prohibits use of the WEP as part of any credit-card processing after, and prohibits any new system from being installed that uses WEP after The use of WEP.Wi-Fi Protected Access (WPA).For the sake of clarity, we discuss WEP authentication in the Infrastructure mode (that is, between a wlan client and an Access Point).4, contents, encryption details edit, wEP was included as the privacy component of the original.Government's export restrictions on cryptographic technology limited the key size.(Both authentication mechanisms are weak; Shared Key WEP is ginecologia y obstetricia de schwarcz pdf deprecated in favor of WPA/WPA2.) Security details edit Further information: Fluhrer, Mantin and Shamir attack Because RC4 is a stream cipher, the same traffic key must never be used twice."Intercepting Mobile Communications: The Insecurity of 802.11" (PDF).15 However, tkip (the basis of WPA) has reached the end of its designed lifetime, has been partially broken, and had been officially deprecated with the release of the 8 standard.19 Dynamic WEP edit Dynamic WEP refers to the combination of 802.1x technology and the Extensible Authentication Protocol.
It was deprecated in 2004 and is documented in the current standard.
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The way the IV was used also opened WEP to a related key attack.
Each character represents 4 bits, 10 digits of 4 bits each gives 40 bits; adding the 24-bit IV produces the complete 64-bit WEP key (4 bits 10 24 bits IV 64 bits of WEP key).
After the authentication and association, the pre-shared WEP key is also used for encrypting the data frames using RC4."wireless network security" (PDF).In 2006, Bittau, Handley, and Lackey showed 2 that the 802.11 protocol itself can be used against WEP to enable earlier attacks that were previously thought impractical.Archived from the original on April 17, 2008.In 2007, Erik Tews, Andrei Pychkine, and Ralf-Philipp Weinmann were able to extend Klein's 2005 attack and optimize it for usage against WEP.If privacy is a primary concern, it is more advisable to use Open System authentication for WEP authentication, rather than Shared Key authentication; however, this also means that any wlan client can connect to the.Archived from the original (PDF) on Retrieved ieee Std 8 (802.11a) defined Wired Equivalent Privacy (WEP).