Browser-Based File Integrity Validation via Hash Comparison
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Solution Overview
Problem
Users often fail to verify the integrity of downloaded files due to a lack of understanding or cumbersome processes, leading to security risks from malicious files, which can result in monetary and security threats.
Innovation Solution
A cybersecurity system that automatically validates file downloads using file hashes and other cryptographic values before allowing access, incorporating a short JavaScript program or web browser plug-in to ensure the integrity of files by comparing actual and expected hashes, and optionally using digital signatures or blockchain technology.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If users manually verify file hashes to ensure integrity, then security reliability is improved, but ease of operation deteriorates due to complexity and user burden
Solution Approach 1:
The system performs automatic hash verification without requiring user intervention. The verification process is self-executing through JavaScript code that automatically downloads files, calculates hashes, compares them with published values, and alerts users only of verification failures, eliminating the need for users to manually perform complex verification steps
Solution Approach 2:
The invention introduces an intermediary verification mechanism between the file download and user execution. A JavaScript program acts as a mediator that automatically performs hash verification, standing between the user and the downloaded file to ensure integrity before the user interacts with the file, thus improving security without adding operational burden
2Ease of operation
If automatic hash verification is implemented, then ease of operation is improved, but device complexity increases due to additional verification components
Solution Approach 1:
The verification logic is implemented as a copyable JavaScript program that can be embedded in web pages or distributed as a standalone tool. This copying approach allows the verification functionality to be replicated across different systems without requiring complex infrastructure, maintaining simplicity while enabling automatic verification
Solution Approach 2:
The invention replaces manual mechanical verification processes with automated computational verification. Instead of users manually calculating and comparing hashes through command-line tools or software, the system uses JavaScript-based automated computation to perform hash verification, reducing operational complexity while maintaining security
3Productivity
If files are made immediately accessible after download, then productivity is improved, but security reliability deteriorates due to exposure to malicious files
Solution Approach 1:
The system performs hash verification as a preliminary action before making the downloaded file accessible to the user. The JavaScript program automatically verifies the file's integrity immediately after download by comparing its hash with the published value, and only after successful verification does it allow the user to access the file, thus preventing malicious files from being executed while maintaining productivity
Data Source
AI summary
A method of verifying the integrity of a downloadable file comprising the steps of requesting a download of a file via a download requesting device comprising an electronic device including a web browsing application through which the download is requested and a web-browser memory; downloading the file into the web-browser memory while preventing the file from being opened or executed by the download requesting device; within the web browsing application, analyzing the file to derive a cryptographic value of the file; within the web browsing application, comparing the derived cryptographic value of the file with a reference value associated with the file that is stored in a memory accessible by the web browsing application; and only when the derived cryptographic value of the file matches the reference value associated with the file, enabling the file to be opened, saved, or executed by the download requesting device.