Before I as a user of Organization A send data about me to organization B, I read the privacy policies enforced by organization B
If I agree to the privacy policies of organization B, then I will send data about me to organization B
If I do not agree with the policies of organization B, then I can negotiate with organization B
Even if the web site states that it will not share private information with others, do I trust the web site
Note: while confidentiality is enforced by the organization, privacy is determined by the user. Therefore for confidentiality, the organization will determine whether a user can have the data. If so, then the organization van further determine whether the user can be trusted
Platform for Privacy Preferences (P3P): What is it?
P3P is an emerging industry standard that enables web sites to express their privacy practices in a standard format
The format of the policies can be automatically retrieved and understood by user agents
It is a product of W3C; World wide web consortium
When a user enters a web site, the privacy policies of the web site is conveyed to the user; If the privacy policies are different from user preferences, the user is notified; User can then decide how to proceed
Several major corporations are working on P3P standards including
Platform for Privacy Preferences (P3P): Organizations
Several major corporations are working on P3P standards including:
Web sites have also implemented P3P
Semantic web group has adopted P3P
Platform for Privacy Preferences (P3P): Specifications
Initial version of P3P used RDF to specify policies; Recent version has migrated to XML
P3P Policies use XML with namespaces for encoding policies
P3P has its own statements and data types expressed in XML; P3P schemas utilize XML schemas
P3P specification released in January 20005 uses catalog shopping example to explain concepts; P3P is an International standard and is an ongoing project
Example: Catalog shopping
Your name will not be given to a third party but your purchases will be given to a third party
What happens if the web sites do no honor their P3P policies
Then appropriate legal actions will have to be taken
XML is the technology to specify P3P policies
Policy experts will have to specify the policies
Technologies will have to develop the specifications
Legal experts will have to take actions if the policies are violated
Privacy for Assured Information Sharing Export Data/Policy Component Data/Policy for Agency A Data/Policy for Federation Export Data/Policy Component Data/Policy for Agency C Component Data/Policy for Agency B Export Data/Policy
Privacy Preserving Surveillance Raw video surveillance data Face Detection and Face Derecognizing system Suspicious Event Detection System Manual Inspection of video data Comprehensive security report listing suspicious events and people detected Suspicious people found Suspicious events found Report of security personnel Faces of trusted people derecognized to preserve privacy
Directions: Foundations of Privacy Preserving Data Mining
We proved in 1990 that the inference problem in general was unsolvable, therefore the suggestion was to explore the solvability aspects of the problem.
Can we do something similar for privacy?
Is the general privacy problem solvable?
What are the complicity classes?
What is the storage and time complicity
We need to explore the foundation of PPDM and related privacy solutions
Directions: Testbed Development and Application Scenarios
There are numerous PPDM related algorithms. How do they compare with each other? We need a testbed with realistic parameters to test the algorithms
It is time to develop real world scenarios where these algorithms can be utilized
Is it feasible to develop realistic commercial products or should each organization adapt product to suit their needs?