File Access Code with Validity Period for Secure Sharing
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Solution Overview
Problem
Existing electronic file sharing systems lack efficient mechanisms for secure and controlled access to files across client devices, particularly in ensuring authorized access and preventing unauthorized access beyond a validity period.
Innovation Solution
A server-generated file access code system that associates a validity time period with the access code, allowing authorized client devices to access electronic files stored on the server, while preventing access once the validity period elapses, and includes features for digital signatures and whitelisting for enhanced security.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a file access code system is implemented without validity time period control, then ease of file sharing is improved, but security and access control deteriorate
Solution Approach 1:
The patent applies parameter changes by introducing a validity time period parameter to the file access code system. The server generates access codes with embedded expiration timestamps, dynamically changing the temporal parameter of code validity. This resolves the contradiction by maintaining ease of sharing through simple code generation while improving security through automatic expiration control, preventing permanent access without complex permission management.
2Ease of operation
If access codes remain valid indefinitely, then ease of access is improved, but unauthorized access prevention deteriorates
Solution Approach 1:
The patent applies preliminary action by pre-defining the validity period and expiration time when the access code is generated. The server embeds the expiration timestamp in advance within the access code structure, so that when a user presents the code, the server can automatically determine validity without requiring additional authorization checks. This prevents unauthorized access while maintaining ease of access for legitimate users within the valid period.
3Productivity
If file sharing is enabled without time constraints, then productivity is improved, but file integrity protection deteriorates
Solution Approach 1:
The patent applies parameter changes by introducing temporal constraints through validity periods and expiration timestamps. The server generates access codes with embedded time parameters that automatically expire after a defined duration. This resolves the contradiction by enabling efficient file sharing through simple code-based access while protecting file integrity through automatic expiration, preventing unauthorized modifications or access after the designated time window without requiring continuous monitoring.
Data Source
AI summary
A server receives a request from a first client device for a file access code. The server generates the file access code, including associating a validity time period with the file access code. The server associates the file access code with a user account at the server and transmits a response to the first client device including the file access code. The server receives, from the first client device, information corresponding to an electronic file. Based on determining that the validity time period for the file access code has not elapsed, the server generates an association between the electronic file and the file access code. The server receives, from a second client device, the file access code. Based on determining that the validity time period of the file access code has not elapsed, the server identifies the electronic file and enables the second client device to access the electronic file.