Evil Twin Attack
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An evil twin attack is a type of wireless network security threat where an attacker creates a fraudulent Wi-Fi access point that mimics a legitimate one.
How it works
The attacker sets up a rogue wireless access point with the same or very similar name (SSID) as a trusted network—like a coffee shop's Wi-Fi or a corporate network. When users connect to this fake access point instead of the real one, the attacker can intercept all their internet traffic.
The attack is particularly effective because:
Users often connect automatically to networks they've used before, without verifying authenticity
The fake network may appear stronger if the attacker positions themselves closer to victims
There's often no visual difference between the legitimate and evil twin networks in a device's Wi-Fi list
What attackers can do
Once a victim connects, the attacker can:
Monitor all unencrypted web traffic and capture sensitive data like passwords or credit card numbers
Perform man-in-the-middle attacks to intercept even some encrypted communications
Redirect users to phishing sites that look identical to legitimate login pages
Inject malware into downloaded files
Protection measures
You can protect yourself by using a VPN on public networks, verifying network names with staff before connecting, avoiding sensitive transactions on public Wi-Fi, ensuring websites use HTTPS, and disabling auto-connect features on your devices. Organizations can protect their networks by using certificate-based authentication and educating users about this threat.
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