IoT security: many devices, one strategy

IoT expands your attack surface. Sound practice means securing devices (secure boot, authentication), the network (encryption, segmentation), and the cloud, plus over-the-air updates.

Security has to be designed in, not bolted on later.

Why this matters for your business

Every connected device widens your attack surface, and IoT has a poor security reputation precisely because devices are often deployed with default passwords, no encryption, and no update path. Weakly secured devices have been hijacked into botnets and used as a way into corporate networks. So IoT security has to be designed in from the start, across three layers: the devices, the network, and the cloud.

At the device level that means authentication, secure boot, and firmware that can be updated over the air as new threats emerge. On the network, encrypt all traffic and segment devices so a compromised sensor can't reach critical systems. In the cloud, apply role-based access, encryption, and monitoring. Following recognised guidance (such as the OWASP IoT principles) and standards like ISO 27001 keeps the whole fleet defensible. Breeur builds IoT with security by design — device authentication, encryption, segmentation, monitoring, and OTA updates — so the connectivity that makes IoT valuable doesn't become the weak point attackers exploit.

Because every connected device widens your attack surface, IoT security has to be designed in from the start, across three layers — the devices, the network, and the cloud — rather than bolted on after deployment. IoT has a poor security reputation precisely because devices are often deployed with default passwords, no encryption, and no update path, and weakly secured devices have been hijacked into botnets and used as a way into corporate networks. At the device level, that means authentication, secure boot, and firmware that can be updated over the air as new threats emerge. On the network, encrypt all traffic and segment devices so a compromised sensor cannot reach critical systems. In the cloud, apply role-based access, encryption, and monitoring. Following recognised guidance such as the OWASP IoT principles, and standards like ISO 27001, keeps the whole fleet defensible. The mistake is treating security as an afterthought on devices chosen only for cost, or assuming that because a sensor seems trivial it cannot be a way in — attackers think exactly the opposite. Build security requirements into device selection and architecture from the outset, and plan for updates over the devices' whole life. When you engage a partner, look for one who designs security by design — device authentication, encryption, segmentation, monitoring, and OTA updates — rather than adding it later. Be clear about what the devices connect to and what an intrusion could reach. Approached this way, the connectivity that makes IoT valuable does not become the weak point that lets attackers in, which — given how many breaches have started with a neglected connected device — is not a nicety but a fundamental requirement of doing IoT responsibly.

Sources

1. IBM, Cost of a Data Breach 2025
2. IBM, Cost of a Data Breach 2025

Figures are drawn from the third-party sources cited above and were cross-checked against them. They reflect industry-wide research and estimates — not guarantees of specific outcomes — and some are indicative industry figures rather than exact measurements.