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【转】WEP, WPA, TKIP, AES & Other Wireless Security Acronyms  

2009-02-05 12:49:19|  分类: computer-protoco |  标签: |举报 |字号 订阅

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from: http://www.darknet.org.uk/2008/12/confused-by-wep-wpa-tkip-aes-other-wireless-security-acronyms/

  • WEP (Wired Equivalent Privacy)—The old, original, now discredited wireless security standard. Easily cracked.
  • WEP 40/128-bit key, WEP 128-bit Passphrase—See WEP. The user key for WEP is generally either 40- or 128-bit, and generally has to be supplied as a hexadecimal string.
  • WPA, WPA1—Wi-Fi Protected Access. The initial version of WPA, sometimes called WPA1, is essentially a brand name for TKIP. TKIP was chosen as an interim standard because it could be implemented on WEP hardware with just a firmware upgrade.
  • WPA2—The trade name for an implementation of the 802.11i standard, including AES and CCMP.
  • TKIP—Temporal Key Integrity Protocol. The replacement encryption system for WEP. Several features were added to make keys more secure than they were under WEP.
  • AES—Advanced Encryption Standard. This is now the preferred encryption method, replacing the old TKIP. AES is implemented in WPA2/802.11i.
  • Dynamic WEP (802.1x)—When the WEP key/passphrase is entered by a key management service. WEP as such did not support dynamic keys until the advent of TKIP and CCMP.
  • EAP—Extensible Authentication Protocol. A standard authentication framework. EAP supplies common functions and a negotiation mechanism, but not a specific authentication method. Currently there are about 40 different methods implemented for EAP. See WPA Enterprise.
  • 802.1x, IEEE8021X—The IEEE family of standards for authentication on networks. In this context, the term is hopelessly ambiguous.
  • LEAP, 802.1x EAP (Cisco LEAP)—(Lightweight Extensible Authentication Protocol) A proprietary method of wireless LAN authentication developed by Cisco Systems. Supports dynamic WEP, RADIUS and frequent reauthentication.
  • WPA-PSK, WPA-Preshared Key—Use of a shared key, meaning one manually set and manually managed. Does not scale with a large network either for manageability or security, but needs no external key management system.
  • RADIUS—Remote Authentication Dial In User Service. A very old protocol for centralizing authentication and authorization management. The RADIUS server acts as a remote service for these functions.
  • WPA Enterprise, WPA2 Enterprise—A trade name for a set of EAP types. Products certified as WPA Enterprise or WPA2 Enterprise will interoperate (EAP-TLS, EAP-TTLS/MSCHAPv2, PEAPv0/EAP-MSCHAPv2, PEAPv1/EAP-GTC & EAP-SIM)
  • WPA-Personal, WPA2-Personal—See Pre-Shared Key.
  • WPA2-Mixed—Support for both WPA1 and WPA2 on the same access point.
  • 802.11i—An IEEE standard specifying security mechanisms for 802.11 networks. 802.11i uses AES and includes improvements in key management, user authentication through 802.1X and data integrity of headers.
  • CCMP—Counter Mode with Cipher Block Chaining Message Authentication Code Protocol. An encryption protocol that uses AES.
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