Encodean – Secure Video Encryption (Java)

Encodean is a Java-based video encryption tool that provides strong, modern encryption for video files using AES‑256‑GCM, optional Zstandard (Zstd) compression, and a password-based key derivation function (KDF).

This project is designed as a clean, single-developer MVP, but follows cryptographic best practices and is structured to scale into a production-grade system.

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Features

• 🔐 AES‑256‑GCM authenticated encryption
• 🔑 Password-based key derivation (PBKDF2)
• 📦 Optional Zstd compression (compress → encrypt)
• 🧪 Full JUnit end-to-end tests (round-trip, wrong password, tamper detection)
• 🖥️ CLI interface (encrypt / decrypt)
• 📂 Streaming encryption (handles large video files)

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Run (CLI)

Encrypt

java -jar encodean.jar encrypt input.mp4 output.enc --compress

• --compress or -c is optional
• Password is prompted securely at runtime

Decrypt

java -jar encodean.jar decrypt output.enc output.mp4

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Example

java -jar encodean.jar encrypt movie.mov movie.enc -c
java -jar encodean.jar decrypt movie.enc movie.mov

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Tests

Test files live in:

src/test/resources/
  ├─ mov_sample.mov
  └─ mp4_sample.mp4

Run all tests:

./gradlew test

Test coverage includes:

• Round-trip encryption/decryption
• Compression on/off
• Wrong password failure
• Ciphertext tamper detection

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Future Improvements

• Chunked encryption (resume / partial decrypt)
• Argon2id KDF
• Public-key (recipient-based) encryption
• Versioned container header
• Desktop UI

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