1. Robust Digital Right Management Scheme (DRM) for Multimedia Anuj Maheshwari (atm2104@columbia.edu) Victor Sutan (vs2134@columbia.edu)

2. Presentation Overview Introduction Project methodology Previous work Plan of action Project Design Flow Conclusion Questions

3. Introduction Motivation: Facilitating control of ownership of multimedia over the internet. Altering existing Digital Rights Management (DRM) schemes Main issues:  Security  Robustness  Efficiency Project goal: To have a software that would provide more security and protection features to existing media players.

4. Project methodology Concepts used:  Watermarking (focusing on Audio)  Robustness against following attacks: MPEG Audio compression Quantization Filtering A/D, D/A conversion  Encryption Cryptographic algorithm (look for this)

5. Previous work – Steinebach [1] Audio watermarking and partial encryption [Steinebach2005]  Transparency between watermarked and encrypted data  Need only one key to decrypt / extract watermark  Lack of robustness against format compression

6. Steinebach 2005 (II)

7. Previous Work – Memon (1998) [2] Authentication Techniques for Multimedia Content [1]  Many techniques for DRM  Visible / Invisible watermarking (Yeung- Mintzer scheme, Wong scheme)  Fragile / Robust watermarking  Possible Attacks

8. Memon (1998) (II)

9. Previous work – Bassia (1999) [3] Robust audio watermarking in the time domain  Embedding of information in audio  Robustness against Lossy compression Quantization and re-quantization Low-pass filtering  Results

10. Bassia (1999) (II)

11. Plan of Action (I) Shortcomings of previous DRM schemes  Non robust to: MPEG compression Quantization Filtering Key issues to be remembered  Security  Efficiency  Robustness

12. Plan of Action (II) Robustness issues to be tackled  Most papers use LSB method  Possible problem associated with LSB Blind retrieval of watermark information  Weighted watermarking to resist attacks from: Compression Quantization and Re-Quantization  Other methods?

13. Plan of Action (III) Efficiency issues to be tackled  Level of computation required on server side large for encryption and watermark generation  Attempt to move computation to client machine?  Alter the format to allow for appending of watermark?

14. Plan of Action (IV) Security issues to be tackled  Investigate other encryption schemes  Allow for less intensive computations  Offer more security than shuffling tables  Allow for minimum probability of random intrusion

15. Project Design Flow

16. Project Design Flow (II)

17. Challenges Anticipated A lot of work has been done Security Robustness Efficiency

18. Project timeline April:  Week of 11 th : Finalize project flow Finalize watermarking and encryption algorithms  Week of 18 th : Implementation of watermarking and encryption  Week of 25 th : Rigorous testing Preparation of final report Preparation for final presentation May  Week of 2 nd: Submission of final report

19. Conclusions Come up with alternate DRM Address the issues of  Robustness  Security  Efficiency

20. References [1] Stienebach M., Zmudzinski S., Bolke T. Audio watermarking and partial encryption Security, Steganography and watermarking of multimedia conference VII, Processing of SPIE-IS&T Electronic Imaging, SPIE Vol. 5681, March 2005 [2] Memon N., Vora P. Authentication Techniques for Multimedia Content, SPIE conference for multimedia systems and applications, SPIE Vol. 3528, Nov. 1998 [3] Bassia P., Pitas I., Robust Audio Watermarking in the time domain 1999 [4] Picard J., Robert A., On the Public Key Watermarking Issue Security and Watermarking of Multimedia Contents III, Proceedings of SPIE Vol. 4314, 2001

21. Questions anyone?