Security Verification Device for Lightweight IoT Key Management
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Solution Overview
Problem
Current security solutions for computing devices, especially small IoT devices, are complex, consume excessive chip space, and lack unified implementations, making them inefficient and costly.
Innovation Solution
A security verification device that utilizes a key derivation function (KDF) to securely authorize or revoke software operations by generating and managing secret keys, with a transceiver to transmit commands and receive wrapped secret keys from a server, and a processor to unwrap and store these keys efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple different security solutions are implemented to meet various security requirements, then security coverage is improved, but device complexity and chip space consumption increase significantly
Solution Approach 1:
The patent implements a universal security verification device that can handle multiple security operations (key generation, key wrapping, authentication, encryption/decryption) through a single integrated architecture. The device uses a unified key management system where a master key can derive multiple operational keys, and a single verification module can authenticate different types of operations, eliminating the need for separate security circuits for each function.
Solution Approach 2:
The patent combines multiple security functions into a single security verification device. The key generation unit, key wrapping unit, authentication unit, and encryption/decryption unit are merged into one integrated security module that shares common resources such as the random number generator, key storage, and verification logic, thereby reducing overall device complexity while maintaining comprehensive security coverage.
2Reliability
If comprehensive security features are implemented, then security reliability is improved, but chip space consumption increases
Solution Approach 1:
The patent implements a nested key structure where a master key stored in secure hardware can derive multiple operational keys through a key derivation function. The master key is nested within the security verification device, while derived keys are used for specific operations. This nesting allows comprehensive security features to be implemented without storing multiple large key sets, thereby reducing chip space consumption while maintaining strong security.
3Reliability
If traditional security implementations are used, then security functionality is achieved, but cost and implementation uniformity worsen
Solution Approach 1:
The patent provides a universal security verification device with standardized interfaces and unified key management that can be implemented consistently across different product lines and manufacturers. The device supports multiple security operations through a single standardized architecture, enabling uniform implementation across the industry while maintaining comprehensive security functionality, thereby improving ease of manufacture and reducing costs.
Data Source
AI summary
Disclosed is a device that obtains and stores a secret key. The device may comprise a transceiver configured to: transmit a command for a secret key to a server; transmit an identifier to the server; and receive a wrapped secret key from the server. The device may further comprise: a storage device; and a processor. The processor may be coupled to the transceiver and the storage device and the processor may be configured to: receive the wrapped secret key from the transceiver; unwrap the wrapped secret key to obtain the secret key; and store the secret key in the storage device.