Cost-Sensitive Learning for Confidential Access Control

Young-Woo Seo, J. Andrew (Drew) Bagnell, and Katia Sycara
tech. report CMU-RI-TR-05-31, Robotics Institute, Carnegie Mellon University, July, 2005


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Abstract
It is common to control access to critical information based on the need-to-know principle; The requests for access are authorized only if the content of the requested information is relevant to the requester's project. We formulate such a dichotomous decision in a machine learning framework. Although the cost for misclassifying examples should be differentiated according to their importance, the best-performing error-minimizing classifiers do not have ways of incorporating the cost information into their learning processes. In order to handle the cost effectively, we apply two cost-sensitive learning methods to the problem of the confidential access control and compare their usefulness with those of error-minimizing classifiers. We devise a new metric for assigning cost to any datasets. From the comparison of the cost-sensitive classifiers with error-minimizing classifiers, we find that costing demonstrates the best performance in that it minimizes the cost for misclassifying the examples and the false positive using a relatively small amount of training data.

Keywords
cost-sensitive learning, confidential access control, machine learning, text learning, artificial intelligence

Notes
Sponsor: ARDA CMU subcontract from CTA, DARPA
Associated Center(s) / Consortia: Center for Integrated Manfacturing Decision Systems
Associated Lab(s) / Group(s): Advanced Agent - Robotics Technology Lab
Number of pages: 26

Text Reference
Young-Woo Seo, J. Andrew (Drew) Bagnell, and Katia Sycara, "Cost-Sensitive Learning for Confidential Access Control," tech. report CMU-RI-TR-05-31, Robotics Institute, Carnegie Mellon University, July, 2005

BibTeX Reference
@techreport{Seo_2005_5078,
   author = "Young-Woo Seo and J. Andrew (Drew) Bagnell and Katia Sycara",
   title = "Cost-Sensitive Learning for Confidential Access Control",
   booktitle = "",
   institution = "Robotics Institute",
   month = "July",
   year = "2005",
   number= "CMU-RI-TR-05-31",
   address= "Pittsburgh, PA",
}