Wired Equivalent Privacy
Wireless Encryption Protocol
(WEP) IEEE 802.11:1999. A cryptographic privacy algorithm, based on the RC4 encryption engine, used to provide confidentiality for 802.11 wireless networks. WEP is intended to provide roughly the same level of confidentiality for wireless data as a wired LAN (Ethernet), which is NOT protected by encryption.
WEP is often wrongly expanded as "Wireless Encryption Protocol". WEP is a protocol that provides encryption on wireless networks but that's not what it stands for.