Cross-Device Digital Signature Verification for Message Authenticity
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Solution Overview
Problem
Existing electronic messaging systems lack the ability to verify the authenticity of the sender, making them vulnerable to cyberattacks where malicious actors can impersonate legitimate users, leading to unauthorized access and transfer of sensitive information.
Innovation Solution
A digital signature security system that generates and verifies digital signatures using a private key, ensuring that messages are authorized by the user, by requesting confirmation from a secondary device distinct from the primary device, and using asymmetric cryptography to authenticate the sender.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If digital signature verification is implemented using a secondary device, then message authenticity is improved, but device complexity is worsened
Solution Approach 1:
The patent introduces a secondary device as an intermediary between the primary messaging device and the verification process. This mediator device holds the private key and performs digital signature verification, separating the authentication function from the primary messaging function. The secondary device receives the message, verifies the digital signature, and communicates the verification result back to the primary device, thereby improving message authenticity while managing system complexity through functional separation.
2Reliability
If confirmation request is sent to a different device, then security against misappropriation is improved, but loss of time is worsened
Solution Approach 1:
The patent implements preliminary action by pre-configuring the secondary device with the user's private key and establishing it as the trusted verification authority before any messaging occurs. When a message needs verification, the system immediately queries the pre-configured secondary device rather than setting up verification infrastructure at the moment of sending. This preliminary setup reduces the time penalty during actual message transmission while maintaining high security standards.
3Loss of information
If digital signature verification is performed locally, then privacy protection is improved, but measurement precision is worsened
Solution Approach 1:
The patent segments the verification process into distinct functional components: the secondary device performs the cryptographic verification operations using the private key, while the primary device handles message composition and user interaction. This segmentation allows verification accuracy to be maintained on the secondary device with appropriate computational resources, while the primary device maintains privacy by not exposing sensitive verification data. The segmented architecture enables both privacy protection and verification precision to coexist.
Data Source
AI summary
Systems and techniques are described herein for validating one or more requests. For example, the systems and techniques can include receiving message data from a first device accessible to a user. The message data can be associated with a message to be sent using the first device. The systems and techniques can also include sending, to a second device accessible to the user, a request for confirmation that the user requested a digital signature for the message, the first device and second device being different devices. The systems and techniques can further include receiving a confirmation from the second device, the confirmation confirming that the user requested the digital signature for the message. The systems and techniques can further include generating the digital signature for the message using the message data and a private key and sending the digital signature to the first device.