An evil twin is a look-alike wireless network controlled by an attacker. Connecting can expose logins and browsing or send you to fraudulent sign-in pages.
How to spot one
Warning signs include duplicate network names, misspellings, a network that unexpectedly asks for email credentials, or a public network that has no normal login process.
What to do
Ask staff for the exact network name. If anything looks unusual, disconnect, forget the network, and use cellular data or a personal hotspot instead.
This page provides general security guidance, not a guarantee that any individual message is safe. When money, passwords, remote access, or sensitive records are involved, verify through a separate trusted channel.