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Volume 12, Issue 3 (March 2026)

Opaline Attachment Defense System For Proactive Detection And Sanitization Of Malicious Email Files

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Volume 12 Issue 07

July 2026

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Author(s)

Mrs. M.Radhika G.Ashika Shreya Agrawal T.Sruthik

Abstract

Email Attachments Remain A Primary Vector For Phishing And Malware Attacks, With Traditional Signature-based Defences Struggling Against Zero-day Threats. This Paper Introduces Opaline, A Proactive Defence System That Leverages Deep Learning Models Like RoBERTa To Analyse Textual Semantics And Structural Features In Attachments Such As PDFs And Documents, Achieving Early Detection Before User Interaction. By Integrating Sandbox Isolation And Automated Sanitization—converting Suspicious Files Into Safe Static Previews—Opaline Minimizes Risks While Preserving Workflow Usability, Offering A Practical Advancement Over Resource-heavy Existing Solutions.

Keywords

Email Attachment Security Malicious File Detection Deep Learning Cybersecurity RoBERTa Malware Classification Proactive Threat Sanitization Sandbox Isolation Phishing Prevention Zero-day Attack Defence Attachment Preview Safety Flask-based Securi

Paper ID

IJSARTV12I3104617

Publication Date

March 1, 2026

Research Area

Information Technology

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