Wearable Device Service Processing via Secure Ciphertext Transmission
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Solution Overview
Problem
Wearable devices are limited to single-function identity verification, resulting in fewer application scenarios and poor applicability during service processing, such as mobile payments, due to their inability to provide comprehensive information securely.
Innovation Solution
A service processing method involving encryption and digital signature techniques using public and private keys, where a first electronic device encrypts a plaintext message with the second electronic device's public key, obtains a message digest, and adds a digital signature to send a secure ciphertext message, allowing the second device to authenticate and perform service processing based on the obtained plaintext message.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a wearable device only provides identity verification function, then the device complexity is low, but the adaptability is poor
Solution Approach 1:
The wearable device is enhanced to perform multiple functions beyond identity verification. It can now provide service information, perform encryption operations, generate digital signatures, and verify certificates. This multi-functionality approach allows the same device to handle various service scenarios (payments, information access, transactions) without requiring separate devices, thereby improving adaptability while managing complexity through integrated design
2Reliability
If plaintext message is transmitted without encryption, then the ease of operation is high, but the reliability is poor
Solution Approach 1:
Encryption and digital signature operations are performed in advance before message transmission. The wearable device pre-computes the ciphertext and digital signature using the recipient's public key and its own private key. This preliminary action ensures information security is established before transmission occurs, and the complexity is managed by performing these operations proactively rather than reactively during communication
Solution Approach 2:
Digital certificates and encryption algorithms serve as intermediaries between the wearable device and service systems. The certificate authority-signed certificate acts as a trusted mediator that verifies the device's identity, while encryption algorithms mediate the secure transmission of information. This intermediary approach enhances reliability by introducing verified trust mechanisms without requiring complex custom authentication protocols
3Reliability
If digital signature and encryption are added to the service processing, then the reliability is improved, but the loss of time increases
Solution Approach 1:
Digital certificates and key pairs are generated and stored in advance in the wearable device. The certificate is obtained from a certificate authority beforehand and stored for quick verification. This preliminary preparation eliminates the need for time-consuming certificate requests and key generation during actual service transactions, reducing processing time while maintaining security
Solution Approach 2:
The wearable device autonomously performs encryption and digital signature operations using its stored private key and certificate. It self-manages the security operations without requiring external intervention or complex coordination with service systems. This self-service capability streamlines the process by eliminating redundant verification steps and reducing communication overhead, thereby reducing time loss while maintaining high security
Data Source
AI summary
The present disclosure relates to the field of terminal technologies, and discloses a service processing method and an electronic device. In the present disclosure, a plaintext message used for performing a service operation is provided in a second electronic device. In this case, when needing to perform service processing, a first electronic device may obtain, by means of encryption transmission between the first electronic device and the second electronic device, the plaintext message provided by the first electronic device, so as to perform service processing based on the plaintext message. No key exchange is involved in the interaction, and a private key of an electronic device is not exported from the device. Therefore, in this process, a device application scenario is significantly extended while information security is ensured.