DATE: Thursday, September 20, 2001 
     TIME: Noon - 1 pm 
     PLACE: Wean Hall 8220 
  
 SPEAKER: 
    Chenxi Wang
    Research Faculty, ECE, Carnegie Mellon 
TITLE: 
     Security Issues for Publish/Subscribe 
      Systems 
ABSTRACT: 
    Publish/subscribe has emerged as a promising paradigm for distributed 
    computing and wide-area content dissemination. A pub/sub system is more 
    flexible and can be more efficient than traditional multicasting, and 
    is well-suited for dynamic membership behaviors. Current research in pub/sub 
    tends to focus on performance and routing algorithms. In this talk I will 
    lay out the security issues present in a general publish/subscribe system. 
    I distinguish between those that can be solved with existing technologies 
    that those that demand new and innovative solutions. I will characterize 
    two open problems--opaque routing and payment in pub/sub--in depth, and 
    explore potential research directions. 
 BIO: 
    Chenxi is currently a research faculty at the Electrical and Computer 
    Engineering Department at CMU. She holds a Ph.D. in Computer Science from 
    the University of Virginia. Her research interests include security 
    solutions for large-scale, distributed systems, and security issues with 
    respect to software engineering. Chenxi held a research associate position 
    at Citibank from 1996 to 1997. She is the recipient of ACM DC Chapter's 
    1999 Samuel Alexander award for Doctoral Candidates and the 1999 outstanding 
    student research award from the University of Virginia. Chenxi served 
    on the program committee for ACM's New Security Paradigm's workshop from 
    1997 to 1999. She is the work-in-progress chair for ACM's ACSAC 2001. 
SDI / LCS Seminar Questions?
    Karen Lindenfelser, 86716, or visit www.pdl.cmu.edu/SDI/ 
