Meaning
A tamper-resistant hardware chip is designed to securely store sensitive data and run cryptographic applications. Utilizing a secure element protects critical information such as encryption keys and biometric data from software-based attacks and physical manipulation. This chip is separate from the main processor, providing an isolated execution environment with its own security mechanisms.
Physical Protection
The chip design includes active shields and sensors that detect changes in light, temperature, or voltage. When an attack is detected, the secure element can automatically erase its memory to prevent key extraction. This physical defense makes it extremely difficult for attackers to bypass the security mechanisms using microprobing or other hardware-level techniques.
Cryptographic Coprocessor
Dedicated cryptographic engines execute high-speed mathematical operations for encryption, decryption, and digital signatures. It offloads these demanding tasks from the main application processor, ensuring that the system’s performance is not compromised. Device test plans specify the maximum execution time for these cryptographic operations to ensure they meet the system’s requirements.
The test reports generated during these evaluations are essential for proving compliance with international security standards such as FIPS or Common Criteria. These documents must be signed off before the product can be released.
System Integration
Interfacing the chip with the main processor requires a secure, encrypted communication bus to prevent eavesdropping on the transferred data. This integration ensures that the entire system benefits from the secure element’s high level of protection.