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2 min read10 weeks

Secure File Transfer with End-to-End Encryption

MediumBTech CSEBCAMCABSc IT+5 moreCybersecurity
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A file sharing application that encrypts files on the sender's device and lets only the intended recipient decrypt them, with expiring links and download limits.

Problem Statement

Sensitive documents are routinely shared over email and chat, where they remain stored and readable indefinitely.

Objectives

1

Encrypt files before upload

2

Exchange keys securely between users

3

Add expiry and download limits to shares

4

Keep an audit log of access

Modules

M1

Encryption Module

Hybrid encryption using public keys and symmetric file keys.

M2

Sharing

Recipient selection, expiring links, and passwords.

M3

Storage

Encrypted file storage with integrity checks.

M4

Audit Trail

Who accessed which file and when.

Expected Output

A web app where a file sent to a recipient can be opened only by them and disappears after the expiry time.

Future Scope

Large file chunking, digital signatures, and mobile apps.

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This project uses: MySQL, Spring Boot, Java, JavaScript. Basic knowledge of these technologies is recommended before starting.