Development Diary of Online Cinema

Jan 10, 2015 JavaFX PHP Cryptography

多设备电影同步观看系统项目开发日志

• JavaFX客户端

• PHP Server

---

####To do list####

• Authentication.
• DRM.
• Client: message management System.
• Client: File download request management.

---

####Jan 18, 2015 to Jan 26, 2015 上个星期有些懈怠，觉得任务太重，心有戚戚。不过没关系，要努力加油～

• Deployment of Laravel. Finished half of the work, built a good foundation, Routing, and ORM.
• Stunnel to the Websocket.

####Jan 17, 2015

• Lavarel Forge

####Jan 16, 2015

• Changed the view in the current cinema controller.
• Used Ratchet WebSocket for Download Request, Sync, Chat, Status Changes. Passed JSON between servers and clients.
• Used Config.Profile class to store current user and current group.
• Used Config.Interface class to store some global interface.

####Jan 12, 2015

• Read JavaFX vs HTML 5
• Started with Laravel

####Jan 11, 2015####

Set up of Laverel:

1. Added php_mcrypt.so and php_pdo_pgsql.so extension to php.ini.
2. Migration of the sample database.
3. Routing of the sample website.

Deployment of a sample Laverel.

Read primitive of DRM algorithms:

1. Broadcast Encryption: Shamir’s Secret Sharing k out of n. Any k + 1 participants can then combine their shares to recover s via interpolation. each authorized recipient deduces the secret, while all others deduce nonsense. Can I use the server as the very vital K?

2. Traitor Tracing：Each user holds a decryption key that is fingerprinted and bound to his identity. In the case of a leakage, a specialized traitor tracing algorithm ensures that the identities of the leaking entities (the traitors) can be revealed.
   • Tracing Based on Leaked Decryption Keys: Boneh and Franklin[17] Boneh and Shaw[22]
   • Tracing Based on Leaked Decrypted Content: watermarking techniques. First, personalized keys are distributed to the users via any broadcast encryption scheme; then, each variant is encrypted under its own key.
   • These tracing methods are suitable for subscription. But my goal is to maximise the leaking cost of the content after decryption.
3. public-key or symmetric-key based:

---

####Jan 10, 2015####

• Recently I have been looking at the authentication and security side of my PHP server, especially for integrating with the Digital Right Management (DRM) system. I adopted the Laravel framework, for class autoloading, front controller routing and authentication.

---

####Jan 9, 2015####

• Moved user and group file into global static variables, which provides easy access from different controllers.
• Add the page for adding new movie.
• Read REST vs WebSocket

---

####Jan 8, 2015####

• Changed live chat from probing to websocket.

---

####Things done in 2014####

• The user interface has been built 70%, with JavaFX.
• The basic query was done on PHP server.