It's easy to find cybersecurity software solutions for Internet of Things (IoT) devices to make your life easier. However, many people forget about the hardware.
Software solutions can monitor and manage your IoT devices, but they don't necessarily solve the underlying problem – these items are inherently insecure. Therefore, you should look at ways to protect your technology from hardware attacks.
The importance of hardware security for IoT
Hardware security in IoT devices is essential to protect collected user data. IoT gadgets are becoming more common and there are expected to be 75 billion connected devices by 2025. This presents a new set of security challenges.
These devices are often cheap and their manufacturers do not always have the expertise to ensure their safety. They are therefore increasingly vulnerable to attack. The fact that these devices are connected to the Internet makes them ideal targets for hackers. Attackers accessing it can infiltrate all other gadgets on the network.
The consequences can be devastating to end users and businesses using these devices for critical functions such as manufacturing or healthcare. A hacker could steal sensitive information or manipulate data without being detected by anyone else using the system, making it impossible for them to detect any problems until it's too late.
Why do you need hardware in addition to software security?
Hardware is essential alongside software security because it provides a layer of protection that software alone cannot.
For starters, some software applications use the standard systems and services that come with the device's operating system—along with other applications installed on top of the underlying operating system. These may be vulnerable to attack. Problems often arise from how these programs interact with hardware components that control access to data or other sensitive information.
Another reason hardware is important in IoT security is how easy it is to compromise a device. In fact, the number of gadgets at risk is so large that organizations can no longer rely solely on traditional software security solutions.
One security breach in 2019 proves this. Hackers were able to install software on 1.5 billion WhatsApp users' devices, compromising their personal information.
Security breaches occur because many companies use off-the-shelf components for their products, which means they need more in-house expertise to design secure software for those parts. They may not see the need because they overlook how much damage just one compromised piece of hardware can cause.
Types of IoT hardware attacks
There are various attacks that hackers use to compromise IoT devices. The most common are:
Side-channel attacks: This type of cyber attack uses information that is observable to the attackers, not to the end users. For example, they may use electromagnetic radiation emitted by devices or time information to gain access to your device.
Brute-force attacks: This trial-and-error method is used to access data by trying many passwords or PINs until automated software guesses the right one.
Rowhammer attacks: This is a form of denial-of-service attack on a device that uses flash memory. The name comes from how the attacker floods memory with repeated read commands, causing it to overwrite itself and potentially corrupt or destroy data.
Fuzzing attacks: These are sending random data to an IoT device until it crashes or stops working properly.
How to improve hardware security in IoT devices
Organizations should take the following hardware security measures to protect end devices.
1. Update firmware remotely
IoT devices are increasingly being used in critical systems, from smart cars to medical equipment. These systems are becoming significantly more complex, often involving hundreds of different components that must communicate with each other. As these systems become more complex, it becomes more difficult for manufacturers to ensure that all components work properly and that there are no security flaws.
Updating the firmware on these devices can improve hardware security. However, this is usually done by sending the new code over a network connection. If someone else has access to that connection, they can send malicious code.
On the other hand, remote firmware update can protect against attacks by ensuring that only authorized users can access your system. This makes it much more difficult for hackers or unauthorized users to get into your network and use it maliciously.
2. Lock down all devices after deploying to production
Locking down IoT devices is a critical step in improving hardware security. It's a simple concept that many companies should pay more attention to when maintaining item protection.
IoT devices are vulnerable to attacks once deployed in production. The longer it stays connected, the more exposed it is to malicious activity. The only way to protect a gadget is to implement strict security measures that should be put in place before using it.
Locking IoT devices involves restricting access by requiring users to enter an authentication code or password each time they want to log in. This eliminates any unwanted access attempts and keeps hackers at bay.
3. Use tamper pins to implement hardware authentication
Tamper pins are a simple but effective way to improve the security of IoT devices.
IoT is the fastest growing global market today and demand for IoT hardware is skyrocketing. However, as with other technologies, this growth can lead to serious security breaches if proper precautions are not taken. To stay safe in such an environment, you need to install protective pins on your devices.
Some hardware attacks may require an attacker to manually remove parts of the device to gain access to debug ports or memory channels. However, rogue pins can increase the security of the hardware and detect when someone tries to break into it.
Once detected, the tamper pin instructs the processor to perform a routine that includes rebooting to protect sensitive data, such as deploying a full memory wipe.
4. Use a Trusted Platform Module (TPM) chip to store cryptographic keys.
A trusted platform (TPM) chip in your IoT device can secure your data and protect it from hackers.
The TPM is a secure cryptoprocessor that runs independently of the main processor of your computer or other devices. It stores sensitive information such as encryption keys, passwords and digital certificates.
You can use TPMs in IoT devices to ensure that they always run in a trusted state and remain secure even when compromised by malware. This will prevent attackers from accessing sensitive data on your system without your knowledge.
The TPM chip is also used to protect cryptographic keys and passwords from being stolen by unauthorized users.
5. Use a secure boot process
Another way to improve IoT security is by using the secure boot process. This ensures that your device is running the correct operating system and has not been tampered with or compromised. This process also guarantees the security of the hardware against any malicious modifications or attacks during its life cycle.
The secure boot process starts when the device is turned on for the first time. At this point, the hardware checks itself for signs of tampering. It then verifies the integrity of all the software components in it. It also ensures that the firmware components are up-to-date and authentic.
You can implement the secure boot process in several ways. One method involves storing the master key on the device before sending it to customers. The device will use this key to verify that all updates are legitimate before applying them to your device.
Protect your end devices with hardware security
It is important to note that hardware plays an important role in IoT security. If you don't consider the potential risks of your device, you can put your customers at risk and the legal consequences can be serious. The last thing you want is to suffer an attack that you could have prevented.
However, if you keep these tips in mind and implement them correctly, you will be able to ensure the safety of all users.
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