Reza Tourani, Satyajayant (Jay) Misra, Travis Mick

Transcription

1 Application-Specific Secure Gathering of Consumer Preferences and Feedback in Information-Centric Networks Reza Tourani, Satyajayant (Jay) Misra, Travis Mick Computer Science Department New Mexico State University

2 Outline v Introduction and Motivation v Problem Definition v Requirements and Preliminaries v Feedback Collection and Delivery Approaches v Conclusions and Future Work

3 Outline v Introduction and Motivation v Problem Definition v Requirements and Preliminaries v Feedback Collection and Delivery Approaches v Conclusions and Future Work

4 Client mining is widespread.

5 Benefits of client mining and recommender systems. Influence on 80% of hours streamed at Netflix (2016) Approximately 35% increase in Amazon revenue (2013) 50% of LinkedIn job applications and job views by members (2011)

6 Netflix Communication Flow Redirecting users Netflix Data Center ( Amazon Cloud Netflix Server CDN Routing DRM Authentication Manifest File Periodic Updates CDNs New user registration User account billing Client

7 Client-Server Interaction in Hulu s.hulu.com (Hosted by Akamai) 3 CDNs (Hosted by Akamai) t.hulu.com (Hosted by Huku) Client

8 Outline v Introduction and Motivation v Problem Definition v Requirements and Preliminaries v Feedback Collection and Delivery Approaches v Conclusions and Future Work

9 Request flow in ICN multi-level architecture.

10 Data flow in ICN multi-level architecture.

11 Pervasive caching eliminates contacting provider for popular content. Cache Hit!

12 How to track client without communication? Caching undermines gathering of access statistics.

13 Outline v Introduction and Motivation v Problem Definition v Requirements and Preliminaries v Feedback Collection and Delivery Approaches v Conclusions and Future Work

14 ICN requirements for successful client mining. Preserving User Privacy Precise Statistics Content Provider Independent Secure feedback collection

15 Content Categorization Generated in advance Available publicly Cacheable Static Content Generated Beforehand Generated in advance Require access control Cacheable Public Content Publicly Available Require Access Control Private Content Generated by request Available publicly Generated On-Demand Dynamic Content Generated by request Require access control Non-Cacheable

16 Static-Public is the largest content category. Content Type in North America 34% 66% Static-Public Other

17 A bigger portion of mobile access traffic is encrypted in comparison to fixed access traffic. Fixed Access Traffic in Mobile Access Traffic in Fixed Access Traffic in North America 2015 North America 2016 North America % 36% 37% 71% 64% 63% Encrypted Un-Encrypted Encrypted Un-Encrypted Encrypted Un-Encrypted Spotlight: Encrypted Internet traffic (

18 Outline v Introduction and Motivation v Problem Definition v Requirements and Preliminaries v Feedback Collection and Delivery Approaches v Conclusions and Future Work

19 Feedback Collection and Delivery Preference Tracking Mechanisms Manifest-Free Manifest-Based Collection by Intermediate routers Collection by Clients Collection by ISP's Server Manifest from Provider Manifest from ISP's Server

20 Drawbacks of Collection by Intermediate Routers Collection Event Per-Interest Per-Hit Drawbacks Redundant Statistics Coarse-level Statistics Computation Overhead Lack of Client ID Drawbacks Coarse-level Statistics Computation Overhead Lack of Client ID

21 Drawbacks of Collection by Clients Approaches Content Partitioning Access Control Enforcement Drawbacks Unknown Partition Size Drawbacks Suitable for Private Content Partition Publication Dependency on Online Server Communication Overhead Dependency on Online Server Communication Overhead

22 Collection by the ISP s Designated Server Provider ISP's Server User Offload Decryption Key or Content Partition Stores Statistics Returns Requested Key or Content Request Decryption Key or Content Partition Benefits Reduced Latency Cache Utilization Drawbacks ISP-Provider Interaction Inaccurate Statistics Independent of Provider

23 Manifest-Based Approaches Manifest Delivery Provider (Un-cacheable) ISP s Server (Cacheable) Drawbacks Extra Latency Provider s Availability Drawbacks Single Point of Failure Network Bottleneck Un-cached Content

24 Outline v Introduction and Motivation v Problem Definition v Requirements and Preliminaries v Feedback Collection and Delivery Approaches v Conclusions and Future Work

25 How about evaluation? v Manifest-based approaches scale much better than the other schemes. v Communication overhead as means of evaluating efficacy of the approaches Manifest based approaches scale better. v Manifest-based approaches introduce fixed amount of overhead per content and the amortized cost will be low. v There is a theoretical upper bound on the required communication overhead percontent: Overhead = Distance client server Manifestsize

26 Conclusions and Future Work v Direct interaction between client and provider with/without help of routers inaccurate and nonscalable. v A viable feedback collection mechanism should leverage caching. v Manifest-based feedback collection approaches are more scalable, especially if it involves infrastructure at the ISP. v Comprehensive evaluation of manifest based approaches (Provider vs. ISP server) and identify which approach in the other class comes closer.

27 Thank you! Research funded by the US National Science Foundation and the US Dept. of Defense.