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Wired Equivalent Privacy (WEP)

WEP is an early, now deprecated Wi-Fi encryption protocol that used RC4 encryption but was found to have critical vulnerabilities, making it easily exploitable and replaced by WPA, WPA2, and WPA3.

Wired Equivalent Privacy (WEP) is an early encryption protocol designed for IEEE 802.11 wireless networks, originally intended to provide data confidentiality comparable to that of traditional wired connections. It uses the RC4 stream cipher along with static, shared secret keys to authenticate users and encrypt data transmissions. As one of the first security mechanisms for Wi-Fi, WEP played a foundational role in establishing the concept of wireless network encryption.

However, WEP was quickly found to contain critical cryptographic vulnerabilities that rendered it ineffective. Its flawed implementation of Initialization Vectors (IVs) resulted in predictable patterns and IV collisions, making it highly susceptible to passive eavesdropping, keystream recovery attacks, and active traffic decryption. Combined with the challenges of static key management, these weaknesses allowed attackers to crack WEP encryption within minutes using freely available tools. As a result, WEP has been widely deprecated and replaced by far more secure protocols, including Wi-Fi Protected Access (WPA), WPA2, and WPA3, which address its fundamental flaws and provide robust protection for modern wireless networks.

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