흔한 IoT 공격 표면

Your tiny device lives online 24/7, so attackers can reach it anytime. An attack surface is every way someone could try to break in. 🔒

Thousands of devices ship with the same login like admin/admin. A default password is the easiest door for an attacker to walk through.

Every service your board exposes is a listening port. Each open port is one more place an attacker can knock and test for weaknesses.

If your sensor sends data as plain HTTP, anyone on the path can read it. Plaintext traffic leaks readings and even credentials in the clear.

An attacker who holds your device can probe its pins or dump memory. Physical access often bypasses every software defense you built.

Your compiled code is firmware, and if it can be replaced, the device can be hijacked. Unprotected updates let attackers install their own code.

Keys baked straight into a sketch can be extracted from the chip. Hard-coded secrets turn one stolen device into a key for your whole fleet.

Hijacked devices get herded into a botnet that floods websites with traffic. The famous Mirai attack used cameras and routers exactly this way.

Your device trusts a backend, so a weak cloud API is part of its attack surface too. One leaked token can expose every device you own.

Before you ship, map every entry point: network, physical, firmware, cloud. This threat model shows where to spend your defense effort first.

The best defense is having fewer doors. Minimizing the attack surface means closing unused ports and removing features you never actually use.

One concept ties many real IoT hacks together.

IoT devices get hacked through default logins, open ports, plaintext data, physical access, and weak clouds. Map these doors, then shrink the attack surface. 🛡️