Are IoT devices secure? — answered by Engineer Saeed Baatiah
Not by default, and most compromises come from three simple omissions: a factory password never changed, an unencrypted connection carrying readable text, and a device exposed directly to the internet with nothing in front of it. The acceptable minimum: a unique key per device, an encrypted connection, no inbound port open from outside, and the ability to update devices remotely when a vulnerability appears.
Most connected-device compromises are not sophisticated attacks but the exploitation of simple neglect. The four common faults: a factory password never changed (and factory password lists are published openly), an unencrypted connection carrying readable, interceptable text, a device exposed directly to the internet on an open port, and one shared key across every device — so leaking it from a single unit opens the entire fleet.
Add to those a consideration specific to devices installed where people can reach them: a device that can be physically opened can have its key extracted. So each device gets its own key, revocable on its own, letting a lost unit be cut off without changing anything on the rest. And remote updating is not a luxury but a requirement — a vulnerability appearing a year later in a device that cannot be updated means physically replacing it.
- A unique key per device, revocable on its own
- Encrypted connection, no inbound port open
- Remote updating is a requirement, not a luxury
- A device that can be opened can have its key extracted