Learning log --2019 / 09/10

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wireless technology

WEP

• What is WEP?

WEP is an abbreviation Wired Equivalent Privacy, the Wired Equivalent Privacy (WEP) protocol is the way the data between the two devices in the wireless transmission of encrypted, to prevent unauthorized users from eavesdropping or a wireless local network. But cryptanalyst has identified several weaknesses in WEP, so it is Wi-Fi Protected Access (WPA) phase-out in 2003, and in 2004 by the full IEEE 802.11i 标准(also known as WPA2replaced). WEP although some weaknesses, but enough to deter the prying eyes of the non-professionals.

• What is IEEE 802.11?
  • IEEE 802.11

IEEE 802.11 wireless LAN is now common standards, wireless network communication standard which is defined by the Institute of Electrical and Electronics Engineers (IEEE).
Although often confused with Wi-Fi and 802.11, but the two are not identical.

WPA (Wi-protection computer network security system)

WPA full name of Wi-Fi Protected Access, WPA and WPA2 has two standards, is a safe protection system wireless computer networks (Wi-Fi), which is the previous generation system investigator should Wired Equivalent Privacy (WEP several serious weaknesses) found and produced. WPA implements a majority of the IEEE 802.11i standard, is a comprehensive transition program before replacement of WEP in 802.11i. WPA is designed to be used on all wireless cards, but may not be used on the first generation of wireless access points. WPA2 with a complete standard system, but it can not be applied on the card, some older models.

WPA2

WPA2 is verified via Wi-Fi Alliance certified IEEE 802.11i standard form. 802.11i WPA2 implements the mandatory element [1], in particular Michael substituted by a recognized algorithm CCMP completely secure message authentication code, and RC4 be substituted AES. Microsoft Windows XP formal support WPA2 in 2005 May 1 launch, but the driver cards may have to be updated. Apple computers support WPA2 on all Macintosh equipped with AirPort Extreme, AirPort Extreme base station and AirPort Express, the desired firmware upgrade is included in AirPort 4.2, 2005 July 14 release.