Hardening the Silicon: Why Analog Anti-Tamper IP is the New Security Baseline

In today’s increasingly connected world, there are billions of SoCs, powering everything from automotive ECUs to industrial IoT sensors and processing sensitive data. While software-level security is taken seriously, hardware-level vulnerabilities have often been an afterthought. As hackers are now using more complex tampering techniques, protecting the physical silicon inside devices has become crucial. Analog anti-tamper IP and sensors can play an important role in strengthening hardware security and preventing attacks that lead to unauthorized access or manipulation.

The primary driver for enhanced hardware security is the mass deployment of decentralized connected devices. According to Agile Analog’s agileSecure anti-tamper presentation, more than ten billion IoT devices are currently in the field. These devices are physically accessible to attackers, making them key targets for invasive and non-invasive tampering. At the same time, as organizations transition to AI-heavy workloads, a single hardware breach could compromise the entire Root of Trust (RoT), resulting in catastrophic data loss and costing millions of dollars. As AI models move to silicon, the need for hardened hardware-level security becomes undeniable.

Hardware attacks are increasingly sophisticated. Hackers can manipulate silicon behavior using techniques such as fault injection, glitching and side channel analysis. Fault injection attacks intentionally introduce errors into a system in order to bypass security checks or access confidential information. Similarly, side channel attacks analyze indirect signals such as power supply or execution timing to extract sensitive data such as cryptographic keys. More advanced physical attacks, including micro-probing, laser fault injection and focused ion beam techniques, allow attackers to access internal circuitry directly. Supply chain threats such as hardware trojans, device cloning and reverse engineering create significant risks for both manufacturers and users.

Recent incidents demonstrate how serious hardware vulnerabilities can be. Field data shows several security breaches caused by hardware attacks. In one instance, voltage glitching was used to bypass secure fuses in consumer electronics to dump encrypted firmware. In the automotive sector, infotainment platforms have been compromised through glitching attacks that neutralized digital signature verification. These examples prove that digital-only security is often not sufficient when attackers can physically interact with hardware.

Analog sensors provide an effective way to detect and prevent many of these attacks. Unlike digital sensors, analog anti-tamper sensors monitor the physical operating conditions of the chip itself. They can detect unexpected voltage levels, irregular clock signals, temperature changes or electromagnetic disturbances that may indicate that an attack is taking place. When these abnormal conditions are detected, the system can trigger an immediate hardware-level response, such as zeroizing keys or forcing a reset.

Several different types of analog anti-tamper sensors are used to strengthen hardware security. Voltage glitch detectors monitor the power supply and identify sudden spikes or drops that could be a sign of an attack. Clock attack monitors detect irregular clock behavior such as frequency manipulation or timing glitches. Thermal sensors identify unusual temperature changes that may occur during cold boot attacks designed to extract encryption keys from memory. Electromagnetic sensors detect electromagnetic fault injection attacks that disrupt internal circuits. By combining multiple sensors, engineers can create layered defenses that significantly increase the difficulty of successfully attacking a device.

Despite their importance, designing analog security sensors presents several challenges. Analog circuit design requires specialized expertise and often involves complex and time consuming manual processes. Variations between semiconductor manufacturing technologies can also make it difficult to reuse designs across different process nodes. As companies face shrinking tape-out windows and a shortage of analog design expertise, many may struggle to implement this advanced hardware security.

Agile Analog is helping to address these challenges. Using the company’s unique Composa tool, it is possible to automatically generate analog IP to a customer’s exact specifications, for any foundry and on any process – from legacy nodes to FinFET. Analog security components from the agileSecure anti-tamper security IP portfolio can be developed more efficiently and deployed across multiple semiconductor technologies. This approach reduces development time and cost while maintaining reliability and performance.

Bottom line: Hardware security has become an essential part of modern electronic systems as connected devices and sophisticated attack techniques continue to increase. Analog anti-tamper sensors provide a critical layer of protection by detecting physical attacks that digital security mechanisms cannot prevent. Integrating these analog sensors into semiconductor designs will play a key role in protecting devices, sensitive data and critical infrastructure in the future.

CONTACT AGILE ANALOG

Also Read:

2026 Outlook with Krishna Anne of Agile Analog

Podcast EP319: What Makes Agile Analog a Unique Company with Chris Morrison

Agile Analog Update at #62DAC