1. Sharable Information Workspace William Lee Computer Science University of Illinois at Urbana-Champaign

2. Motivation  P2P offers a powerful platform to share information More effective usage of bandwidth Services can be more decentralized Currently usage limits to file sharing  Difficult to manage information within a community Hard to organize personal web pages, blogs, and sharable files Access control hard to enforced What about accessing the deep web?

3. Community Information Lifecycle Private InformationAda Personal P2P Gateway Public Information Private P2P Subnet Public P2P Network Bob Jane produces Change status publish P2P Network share retrieve/contribute information

4. Information Workspace  Jane’s desktop can be managed by a personal agent (P2P Gateway)  Private information Encrypted and distributed to the private P2P subnet Access is enforced through a smart distributed access control system within the P2P subnet Can invite any individual to join the subnet  Public information Shared among all P2P clients Access control not enforced

5. Advantages  Efficient use of computing resources  Can access private information securely everywhere, as long as one can log into the private P2P networks  Information is easily sharable among people in the subnet  Each private P2P network can provide services such as searching and mining on member’s shared information

6. Possible Services within a P2P Subnet  Entity linking and ontology creation Link entities within a subnet with triplets like (entityA, relationship, entityB) Producer of the information can be identified easily Certain ontology can be inferred by user action (e.g. Access to another’s research paper in the subnet implies “citing”)  Expert ranking / Interest Finding Based on the documents within the subnet, find the experts of a subject or people who share common interests

7. The 10-Million-Dollars Question  50% on distributed access control and file sharing systems  50% on distributed information access services