Accessory Authentication Encryption Chip Key Security
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Solution Overview
Problem
Existing accessory certification methods using asymmetric encryption algorithms are vulnerable to key breaches, allowing illegitimate accessories to be certified as legitimate, posing a risk to electronic apparatus safety and security.
Innovation Solution
An encryption chip with a first memory module storing a private certification key and a mixed certification key formed by combining a public certification key and pseudo keys, where the public certification key is extracted using an algorithm when the electronic apparatus and accessory connect, enhancing security by hiding the true key with pseudo keys.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If public key and private key are stored directly in secure memory without processing, then key retrieval is simple and fast, but security level is low and keys are easy to break
Solution Approach 1:
The patent applies preliminary action by pre-processing the public key through combination with pseudo-keys to generate a mixed certification key before storage. This preparation step ensures that when the key is retrieved from memory, it is already in a protected form, eliminating the need for complex processing at retrieval time while maintaining high security levels.
Solution Approach 2:
The patent introduces pseudo-keys as an intermediary element between the original public key and the stored certification key. By combining the public key with pseudo-keys to create a mixed certification key, the system adds a protective layer that prevents direct access to the original public key, thereby enhancing security without requiring complex decryption processes during normal operation.
2Reliability
If public key is broken by hackers, then accessory certification system is compromised and illegitimate accessories can be certified, but implementing better key protection increases storage and processing complexity
Solution Approach 1:
The patent applies segmentation by dividing the certification key into two distinct components: the original public key and pseudo-keys. These segmented components are combined through a predetermined rule to form a mixed certification key. This segmentation ensures that even if one component is compromised, the complete certification security cannot be breached without both components, thereby enhancing accessory certification security while maintaining manageable complexity through the use of a predetermined combination rule.
Solution Approach 2:
The patent uses the composite materials principle by creating a mixed certification key that combines the public key with pseudo-keys. This composite key structure integrates multiple elements (public key + pseudo-keys) to form a stronger, more secure certification mechanism. The composite nature of the key provides enhanced protection against hacking while the use of a predetermined combination rule keeps the implementation complexity manageable.
3Productivity
If the same public key and private key are used for multiple accessory certifications, then certification process is efficient, but security risk increases as keys become vulnerable to breaking
Solution Approach 1:
The patent applies dynamics by making the pseudo-keys dynamic rather than static. The pseudo-keys are generated differently for each accessory certification instance, which means the mixed certification key changes with each certification event. This dynamic approach maintains certification efficiency because the generation and combination process is automated, while simultaneously improving security since hackers cannot use previously broken keys to compromise future certifications.
Data Source
Figure 1~2
AI summary
Disclosed are an accessory (11), an electronic device (13) and a system for accessory authentication, the accessory comprising an encryption chip (111), the encryption chip comprising a first memory module (121) for storing a private authentication key and a hybrid authentication key obtained by combining at least a public authentication key and a pseudo key according to a preset rule, such that when the electronic device is physically connected to the accessory, a processing module (131) of the electronic device can at least extract the public authentication key from the hybrid authentication key according to an algorithm matching the preset rule, and authenticate the accessory with the public authentication key, thus enhancing security of the key and improving the security and reliability for the electronic device in using the accessory.