Which wireless security standard is the oldest?

WEP, or Wired Equivalent Privacy, is the oldest wireless security standard among the options provided. It was introduced as part of the original IEEE 802.11 standard in 1997 to provide a level of security for wireless networks that was comparable to what wired networks could offer. WEP was designed to encrypt wireless data and prevent unauthorized access to networks.

However, as time progressed, various vulnerabilities in the WEP protocol became clear, leading to its eventual obsolescence in favor of more secure protocols. WPA (Wi-Fi Protected Access) was introduced later as an interim solution, followed by WPA2 and then WPA3, each improving upon the security features and addressing the weaknesses found in WEP. Therefore, in terms of the timeline of development and implementation of wireless security standards, WEP is indeed the oldest.