You may have heard that by 2020, over 50 billion IoT devices will be connected to the internet. But how many of these applications are actually in use today? Despite the hype, many IoT projects remain stuck in development because security issues haven't been fully resolved. To address this challenge, a Chinese startup named AstralNet has introduced the SAGE (Secure Authentication Group Engine) algorithm, aiming to become the key enabler for the widespread adoption of IoT technologies.
According to Chen Jixian, co-founder and CEO of AstralNet, scenarios like hacked self-driving cars, remote-controlled nuclear power plants, or even factory explosions—common in Hollywood movies—are no longer just fiction. With the rise of the Internet of Things, such threats could become real if not properly addressed. Chi Mingyang, the company’s technical director, explained that unlike traditional computers, IoT devices often lack the ability to run antivirus software, making it essential to prevent attacks at the source.
The SAGE algorithm is not a new concept but rather an integration of existing encryption technologies, including elliptic curve cryptography and key management systems, into a software development kit (SDK). This SDK can then be embedded into hardware-based encryption chips, offering a more secure solution for IoT devices.
Chen Jixian noted that AstralNet provides both pure software encryption solutions and hardware-embedded options. While software encryption can’t guarantee 100% protection, customers who require maximum security can opt for the hardware version. This ensures that hackers cannot access the firmware secrets. Additionally, the SDK supports flexible configurations to meet the specific needs of different applications.
For example, in a smart home setup, the device might only need a small electronic key. In such cases, complex encryption algorithms aren’t necessary due to power constraints and battery life limitations. The SAGE algorithm adapts accordingly, providing the right level of security without unnecessary overhead.
Unlike current ATM systems that rely on cloud-based authentication, the SAGE mechanism enables true end-to-end mutual authentication between devices without going through the cloud. Imagine a cash machine communicating directly with a bank server. Today, the front-end machine connects to the cloud to get a certificate, which is then verified by the back-end. With SAGE, this process becomes direct and secure, eliminating the need for cloud intermediaries.
According to Chen Jixian, the system automatically generates keys and uses network transmission to enable two-way authentication between devices. This not only improves efficiency but also enhances security by reducing potential attack points.
Chi Mingyang believes that the real Internet of Things can only be realized when devices operate independently of the cloud. He argues that it's impractical for all IoT devices to rely on cloud-based authentication in the future. AstralNet aims to provide a secure, decentralized way for devices to communicate and authenticate each other.
It’s worth noting that AstralNet’s SDK is compatible with low-power Cortex M0 processors, and the two-way authentication process takes only 60 milliseconds. This makes it ideal for a wide range of IoT applications, from smart homes to industrial automation, ensuring both speed and security.
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