Email Attachment Security via Sandbox Isolation
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Solution Overview
Problem
Current cybersecurity measures fail to effectively prevent phishing attacks by not being able to distinguish between legitimate and malicious message attachments without processing the attachments, which can compromise user devices and systems.
Innovation Solution
A system that includes a client computing device with a messaging client configured to receive electronic messages and prevent attachment activation until determining if the message is legitimate or malicious, using mock malicious messages to train users and analyze message components for trustworthiness, and quarantining messages until verification is complete.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the system processes the attachment to determine legitimacy, then the accuracy of malicious message detection is improved, but the user's computing device may be compromised by malicious code in the attachment
Solution Approach 1:
The patent introduces a sandboxed environment as an intermediary between the user's computing device and the potentially malicious attachment. The attachment is processed in this isolated sandbox environment rather than directly on the user's device, allowing legitimacy determination while preventing device compromise. The sandbox acts as a mediator that enables safe execution and analysis of suspicious attachments.
Solution Approach 2:
The system segments the attachment processing function from the user's main computing environment by creating a separate sandboxed execution environment. This segmentation isolates the potentially harmful processes from the user's device, allowing the system to analyze attachments for legitimacy without exposing the user's system to malicious code.
2Reliability
If the system analyzes all message attachments, then the security protection is improved, but the processing time and system resources are increased
Solution Approach 1:
The system applies partial action by selectively processing attachments based on risk assessment rather than analyzing every attachment uniformly. It uses heuristics and metadata analysis to identify high-risk attachments that require full sandboxed processing, while lower-risk attachments may be processed more quickly or with fewer resources, reducing overall processing time while maintaining security.
Solution Approach 2:
The system performs preliminary analysis of attachment metadata, headers, and characteristics before deciding whether full sandboxed processing is necessary. This preliminary action filters out obviously safe attachments or those with clear legitimacy indicators, allowing the system to focus intensive processing only on suspicious attachments and reduce overall processing time.
3Reliability
If the system blocks all attachments from unknown senders, then the security protection is improved, but the ease of operation deteriorates due to false positives
Solution Approach 1:
The system implements feedback mechanisms where user actions (such as reporting false positives or confirming legitimate attachments) are used to improve future detection accuracy. The system learns from user feedback to adjust its blocking decisions, reducing false positives over time while maintaining security protection. This feedback loop allows the system to become more accurate in distinguishing legitimate from malicious attachments.
Solution Approach 2:
The system dynamically adjusts its security parameters and blocking thresholds based on contextual information, sender reputation, and historical data. Rather than using fixed blocking rules, the system modifies its behavior parameters to balance security and user convenience, allowing legitimate attachments from previously trusted senders while maintaining protection against new threats.
Data Source
AI summary
A system manages computer security risks associated with message file attachments. When a user of an electronic device with a messaging client attempts to open an attachment to a message that is in the client's inbox, the system will analyze the message to determine whether the message is a legitimate message or a potentially malicious message without the need to actually process or analyze the attachment itself. If the system determines that the received message is a legitimate message, the system will permit the attachment to actuate on the client computing device. If the system determines that the received message is not or may not be a legitimate message, the system will continue preventing the attachment from actuating on the client computing device.