1.Register (purchase the content)

2.Request Loginid,password,file

3.Digital Receipt (token)

4.Send Token

7.Data file

5.Check for id

6.User is auth or unauth

Illegal re

quest

Poisoned chunks

Start DA & request again

Stop Piracy at the Presence of Colluders.

Pirates Detected Immediately upon First Attempt.

Protection Scheme Performs Better for Large Files.

Negligible Detection and Poisoning Overhead.

Prototyping and Benchmark Experiments Needed.

Integration of Trusted P2P System with Reputation System and DRM Scheme.