Ramón Cáceres
AT&T Labs
180 Park Avenue
Florham Park, NJ 07932, USA
+1 973 360 5862
r a m o n @ k i s k e y a . n e t
http://www.kiskeya.net/ramon

Contents:   Interests | Education | Experience | Publications | Patents | Mentoring | Awards | Grants | Activities

Research Interests

Experimental research in computer systems and networks. More specific interests include mobile/pervasive/ubiquitous computing, wireless networking, network measurement, virtualization, and security.

Education

Ph.D. in Computer Science
1987 - 1992		 University of California at Berkeley
Berkeley, California
    Ph.D. Dissertation: Multiplexing Traffic at the Entrance to Wide-Area Networks. Advisor: D. Ferrari.
    Minor in History of Science and Technology.
M.S. in Computer Science
1983 - 1984		 University of California at Berkeley
Berkeley, California
    M.S. Project: Process Control in a Distributed Berkeley Unix Environment. Advisor: D. Ferrari.
B. Eng. in Electrical Engineering
1979 - 1983		 McGill University
Montréal, Québec
    Faculty Scholar. Computer Engineering Option. Minor in Management.

Professional Experience

Lead Member of Technical Staff
2008 - present		 AT&T Labs
Florham Park, New Jersey
    Research in mobile/pervasive/ubiquitous computing.
Research Staff Member
2003 - 2008		 IBM Research
Hawthorne, New York
    2005 - 2008: Research in pervasive computing and secure systems. • Designed and built a Trustworthy Kiosk system, in which a user leverages his mobile phone to verify the identity and integrity of software loaded on a public computing device, prior to revealing personal information to that device. • Combined virtual machines, mandatory access controls, and hardware roots of trust to establish distributed Trusted Virtual Domains with strong isolation and integrity guarantees.

    2003-2005: Research in pervasive computing and software development tools. • Prototyped and evaluated SoulPad, a new mobility approach based on carrying an auto-configuring operating system and a suspended virtual machine on a pocket-sized device. SoulPad enables rapid personalization of PCs without preinstalled software or network connectivity. • Created Composite Projects, a facility for grouping and nesting programming projects in the Eclipse integrated development environment.

Chief Technology Officer
2001 - 2003		 ShieldIP, Inc.
New York, New York
    Employee number two. Formed and managed the research and development group. Technical liaison to partners and customers. Led software design, coding and testing. Wrote content protection software for thumb-sized mobile device. Built regression testing framework. Overall emphasis on security engineering.

    ShieldIP developed a novel technology for identifying and protecting digital content while preserving user privacy.

Chief Scientist
2000 - 2001		 Vindigo, Inc.
New York, New York
    Provided technical direction and prototyped technology. Devised and implemented algorithms for computing driving directions on resource-limited handheld devices. Developed walking directions software for wireless phone server. Evaluated geographic information systems, mapping data providers, and wireless data services.

    Vindigo is an award-winning provider of location-based services for mobile devices. Vindigo's interactive city guides for mobile phones and PDAs gained hundreds of thousands of users within a year of launch. Vindigo was acquired by For-Side in 2004.

Principal Member of Technical Staff
1994 - 2000		 AT&T Labs and AT&T Bell Labs
Florham Park and Holmdel, New Jersey
    1998 - 2000: Research in network measurement. • Introduced MINC, a set of techniques for inferring the internal behavior of networks based on end-to-end multicast measurements. Validated MINC through MBone experiments. Enabled impromptu measurement infrastructures by standardizing MINC data collection as extensions to the Real Time Protocol. • Developed a tool for monitoring Internet multimedia traffic that parses signaling protocols at packet capture time to track dynamically assigned port numbers.

    1996 - 1998: Research in wide-area networking and wireless networking. • Built and deployed PacketScope, a system for capturing IP packets on high-speed links for unlimited periods. Used the system to gather extensive traces of public Internet traffic. Used the traces to evaluate policies for multiplexing Web traffic over flow-switched networks, and to investigate performance issues in Web proxy caching. • Led the deployment of an early wireless LAN with more than 25 access points.

    1994 - 1996: Research in mobile computing and wireless networking. Among the first to propose, design, and prototype a hierarchical handoff scheme for Mobile IP. Demonstrated its performance benefits via experiments on a wireless network. Showed that handoffs were fast and reliable enough to support interactive audio applications such as Voice over IP.

Scientist
1992 - 1994		 Matsushita Information Technology Lab
Princeton, New Jersey
    Research in mobile computing and wireless networking. • Among the first to quantify the impact of cellular handoffs on the performance of TCP via experiments on a wireless network. Devised a fast retransmission strategy for alleviating the problem and demonstrated its effectiveness, also via experiment. • Evaluated storage alternatives for mobile computers. Showed the benefits and challenges of using flash memory-based file systems for portable devices.

Post-Graduate Researcher
1987 - 1992
University of California at Berkeley and
International Computer Science Institute
Berkeley, California
    Research in wide-area networking. Built and deployed two systems for capturing IP packets. Among the first to gather raw traces of wide-area Internet traffic and use them to empirically characterize dominant TCP/IP applications. Findings contradicted widely held beliefs regarding data traffic. Used resulting models to evaluate policies and mechanisms for transporting IP traffic over ATM networks. Showed that ATM cell sizes and adaptation layers caused gross bandwidth inefficiencies for Internet traffic.

Research Intern
1988, 1989, 1990
AT&T Bell Labs
Murray Hill, New Jersey
    Research in wide-area networking. Contributed to the Experimental University Network (XUNET), a virtual circuit-switched network that linked universities in California, Illinois and Wisconsin to Bell Labs in New Jersey. Built VCSIM, a network simulator for the study of multiplexing datagrams over virtual circuits.

Software Development Engineer
1984 - 1987		 Pyramid Technology Corp.
Mountain View, California
    Unix kernel development. Designed, implemented and released data communication products, including IP over X.25, IP over HDLC, and raw X.25/X.28/X.29. Ported Streams I/O from AT&T to Berkeley Unix. Improved the multiprocessor performance of the Fast File System.

    Pyramid created a line of shared-memory multiprocessor systems based on a proprietary RISC architecture and the Unix operating system. Pyramid went public in 1985 and was acquired by Siemens in 1995.

Publications

There are more than 2,000 citations to this body of work according to Google Scholar. Citation counts for individual papers are provided below where greater than 50.

Refereed Periodical Articles

  1. S. Berger, R. Cáceres, D. Pendarakis, R. Perez, R. Sailer, W. Schildhauer, D. Srinivasan and R. Valdez, TVDc: Managing Security in the Trusted Virtual Data Center, ACM SIGOPS Operating Systems Review, Vol. 42, No. 1, January 2008.
  2. B. D. Payne, R. Sailer, R. Cáceres, R. Perez and W. Lee, A Layered Approach to Simplified Access Control in Virtualized Systems, ACM SIGOPS Operating Systems Review, Vol. 41, No. 4, July 2007.
  3. G. Banavar, J. Black, R. Cáceres, M. Ebling, E. Stern and J. Kannry, Deriving Long-Term Value from Context-Aware Computing, Information Systems Management, special issue on Ubiquitous Computing, Vol. 22, No. 4, Fall 2005.
  4. R. Cáceres, J. Donham, B. Fitterman, D. Joerg, M. Smith and T. Vetter, Mobile Computing Technology at Vindigo, IEEE Wireless Communications, Vol. 9, No. 1, February 2002.
  5. J. van der Merwe, R. Cáceres, Y. Chu and C. J. Sreenan, mmdump: A Tool for Monitoring Internet Multimedia Traffic, ACM SIGCOMM Computer Communication Review, Vol. 30, No. 5, October 2000.
  6. R. Cáceres, N. G. Duffield, A. Feldmann, J. Friedmann, A. Greenberg, R. Greer, T. Johnson, C. Kalmanek, B. Krishnamurthy, D. Lavelle, P. Mishra, K. K. Ramakrishnan, J. Rexford, F. True and J. E. van der Merwe, Measurement and Analysis of IP Network Usage and Behavior, IEEE Communications, Vol. 38, No. 5, May 2000. (Cited ~90 times)
  7. A. Adams, T. Bu, R. Cáceres, N. G. Duffield, T. Friedman, J. Horowitz, F. Lo Presti, S. B. Moon, V. Paxson and D. Towsley, The Use of End-to-End Multicast Measurements for Characterizing Internal Network Behavior, IEEE Communications, Vol. 38, No. 5, May 2000. (Cited ~90 times)
  8. R. Cáceres, N. G. Duffield, J. Horowitz and D. Towsley, Multicast-Based Inference of Network-Internal Loss Characteristics, IEEE Transactions on Information Theory, Vol. 45, No. 7, November 1999. (Cited ~155 times)
  9. A. Feldmann, J. Rexford and R. Cáceres, Efficient Policies for Carrying Web Traffic over Flow-Switched Networks, IEEE/ACM Transactions on Networking, Vol. 6, No. 6, December 1998. (Cited ~85 times)
  10. R. Cáceres and V. N. Padmanabhan, Fast and Scalable Wireless Handoffs in Support of Mobile Internet Audio, ACM/Kluwer Journal on Mobile Networks and Applications, Vol. 3, No. 4, December 1998. (Cited ~90 times)
  11. R. Cáceres and L. Iftode, Improving the Performance of Reliable Transport Protocols in Mobile Computing Environments, IEEE Journal on Selected Areas in Communications, Vol. 13, No. 5, June 1995. (Cited ~425 times)
  12. P. Danzig, S. Jamin, R. Cáceres, D. Mitzel and D. Estrin, An Empirical Workload Model for Driving Wide-Area TCP/IP Network Simulations, Wiley Journal of Internetworking: Research and Experience, Vol. 3, No. 1, March 1992. (Cited ~95 times)

Refereed Conference Papers

  1. S. Garriss, R. Cáceres, S. Berger, R. Sailer, L. van Doorn and X. Zhang, Trustworthy and Personalized Computing on Public Kiosks, Proc. of 6th ACM/USENIX International Conference on Mobile Systems, Applications and Services (MobiSys), June 2008. (18% acceptance rate)
  2. J. McCune, T. Jaeger, S. Berger, R. Cáceres and R. Sailer, Shamon: A System for Distributed Mandatory Access Control, Proc. of 22nd Annual Computer Security Applications Conference (ACSAC), December 2006. (30% acceptance rate)
  3. S. Berger, R. Cáceres, K. Goldman, R. Perez, R. Sailer and L. van Doorn, vTPM: Virtualizing the Trusted Platform Module, Proc. of 15th USENIX Security Symposium, July 2006. (12% acceptance rate)
  4. D. Soroker, R. Cáceres, D. Dig, A. Schade, S. Spraragen and A. Tiwari, Pegboard: A Framework for Developing Mobile Applications, Proc. of 4th ACM/USENIX International Conference on Mobile Systems, Applications and Services (MobiSys), June 2006. (15% acceptance rate)
  5. R. Sailer, E. Valdez, T. Jaeger, R. Cáceres, R. Perez, S. Berger, J. L. Griffin and L. van Doorn, Building a MAC-Based Security Architecture for the Xen Open-Source Hypervisor, Proc. of 21st Annual Computer Security Applications Conference (ACSAC), December 2005. (20% acceptance rate)
  6. R. Cáceres, C. Carter, C. Narayanaswami and M. Raghunath, Reincarnating PCs with Portable SoulPads, Proc. of 3rd ACM/USENIX International Conference on Mobile Systems, Applications and Services (MobiSys), June 2005. (24% acceptance rate) (Best Paper Award)
  7. R. Cáceres, N. G. Duffield and T. Friedman, Impromptu Measurement Infrastructures using RTP, Proc. of IEEE Conference on Computer Communications (Infocom), June 2002. (20% acceptance rate)
  8. R. Cáceres, N. G. Duffield, S. B. Moon and D. Towsley, Inference of Internal Loss Rates in the MBone, Proc. of IEEE/ISOC Global Internet '99 Symposium, December 1999. (22% acceptance rate)
  9. R. Cáceres, N. G. Duffield, J. Horowitz, F. Lo Presti and D. Towsley, Loss-based Inference of Multicast Network Topology, Proc. of IEEE 1999 Conference on Decision and Control, December 1999. (unknown acceptance rate)
  10. A. Feldmann, R. Cáceres, F. Douglis, G. Glass and M. Rabinovich, Performance of Web Proxy Caching in Heterogeneous Bandwidth Environments,, Proc. of IEEE Conference on Computer Communications (Infocom), March 1999. (31% acceptance rate) (Cited ~145 times)
  11. R. Cáceres, N. G. Duffield, J. Horowitz, D. Towsley and T. Bu, Multicast-Based Inference of Network-Internal Characteristics: Accuracy of Packet Loss Estimation, Proc. of IEEE Conference on Computer Communications (Infocom), March 1999. (31% acceptance rate) (Cited ~70 times)
  12. R. Cáceres, N. G. Duffield, J. Horowitz and D. Towsley, Statistical Inference for Internal Link Parameters in a Network, Proc. of 1998 American Statistical Association Annual Meeting, August 1998. (unknown aceptance rate)
  13. A. Feldmann, J. Rexford and R. Cáceres, Reducing Overhead in Flow-Switched Networks: An Empirical Study of Web Traffic, Proc. of IEEE Conference on Computer Communications (Infocom), March 1998. (21% acceptance rate)
  14. R. Cáceres and V. N. Padmanabhan, Fast and Scalable Handoffs for Wireless Internetworks, Proc. of ACM International Conference on Mobile Computing and Networking (MobiCom), November 1996. (22% acceptance rate) (Cited ~195 times)
  15. F. Douglis, R. Cáceres, F. Kaashoek, K. Li, B. Marsh and J. Tauber, Storage Alternatives for Mobile Computers, Proc. of 1st USENIX Symposium on Operating Systems Design and Implementation (OSDI), November 1994. (12% acceptance rate) (Cited ~100 times)
  16. R. Cáceres and L. Iftode, The Effects of Mobility on Reliable Transport Protocols, Proc. of 14th IEEE International Conference on Distributed Computing Systems (ICDCS), June 1994. (28% acceptance rate) (Cited ~75 times)
  17. R. Cáceres, P. Danzig, S. Jamin and D. Mitzel, Characteristics of Wide-Area TCP/IP Conversations, Proc. of ACM Conference on Computer Communications (SIGCOMM), September 1991. (22% acceptance rate) (Cited ~185 times)
  18. R. Cáceres, The Pyramid IP to X.25 Protocol Interface: Merging DDN and PDN Approaches, Proc. of Uniforum 1987, January 1987. (unknown acceptance rate)
  19. L. F. Cabrera, S. Sechrest and R. Cáceres, The Administration of Distributed Computations in a Networked Environment, Proc. of 6th IEEE International Conference on Distributed Computing Systems (ICDCS), May 1986. (38% acceptance rate)

Refereed Workshop Papers

  1. S. Garriss, R. Cáceres, S. Berger, R. Sailer, L. van Doorn and X. Zhang, Towards Trustworthy Kiosk Computing, Proc. of 8th IEEE Workshop on Mobile Computing Systems and Applications (HotMobile), February 2007.
  2. T. Jaeger, P. McDaniel, L. St. Clair, R. Cáceres and R. Sailer, Shame on Trust in Distributed Systems, Proc. of USENIX Workshop on Hot Topics in Security (HotSec), July 2006.
  3. R. Cáceres and R. Sailer, Trusted Mobile Computing, Proc. of IFIP Workshop on Security and Privacy in Mobile and Wireless Networks, May 2006.
  4. J. L. Griffin, T. Jaeger, R. Perez, R. Sailer, L. van Doorn and R. Cáceres, Trusted Virtual Domains: Toward Secure Distributed Services, Proc. of 1st IEEE Workshop on Hot Topics in System Dependability (HotDep), June 2005.
  5. R. Cáceres, B. Krishnamurthy and J. Rexford, HTTP 1.0 Logs Considered Harmful, Proc. of W3C Web Characterization Group Workshop, November 1998.
  6. R. Cáceres, F. Douglis, A. Feldmann, G. Glass and M. Rabinovich, Web Proxy Caching: The Devil is in the Details, Proc. of ACM SIGMETRICS Workshop on Internet Server Performance, June 1998. (Cited ~120 times)
  7. R. Cáceres, F. Douglis, K. Li and B. Marsh, Operating System Implications of Solid-State Mobile Computers, Proc. of 4th IEEE Workshop on Workstation Operating Systems (WWOS), October 1993.

Book chapters

  1. R. Cáceres and L. Iftode, Improving the Performance of Reliable Transport Protocols in Mobile Computing Environments, Mobile Computing, Kluwer Academic Publishers, ISBN 0-7923-9697-9, 1996.
  2. F. Douglis, R. Cáceres, F. Kaashoek, K. Li, B. Marsh and J. Tauber, Storage Alternatives for Mobile Computers, Mobile Computing, Kluwer Academic Publishers, ISBN 0-7923-9697-9, 1996.

Technical Reports (otherwise unpublished)

  1. R. Cáceres, Multiplexing TCP Traffic over Wide-Area ATM Networks, MITL-TR-99-93, Matsushita Information Technology Lab, March 1993.
  2. B. Marsh, F. Douglis and R. Cáceres, Systems Issues in Mobile Computing, MITL-TR-50-93, Matsushita Information Technology Lab, February 1993.
  3. R. Cáceres, Multiplexing Traffic at the Entrance to Wide-Area Networks, Ph.D. Dissertation, UCB/CSD 92/717, University of California at Berkeley, December 1992.
  4. R. Cáceres, Efficiency of Asynchronous Transfer Mode Networks in Transporting Wide-Area Data Traffic, TR-91-043, International Computer Science Institute, July 1991.
  5. R. Cáceres, Measurements of Wide-Area Internet Traffic, UCB/CSD 89/550, University of California at Berkeley, December 1989.
  6. R. Cáceres, Separating Abstraction from Implementation in Communication Network Design, TR-89-026, International Computer Science Institute, May 1989.
  7. R. Cáceres, Process Control in a Distributed Berkeley Unix Environment, M.S. Report, UCB/CSD 84/211, University of California at Berkeley, December 1984.

Other Publications

  1. T. Friedman, R. Cáceres and A. Clark (editors), RTP Control Protocol Extended Reports, RFC 3611, Proposed Standard, Internet Engineering Task Force, November 2003.
  2. R. Cáceres, Digest of Proceedings: 2nd IEEE Workshop on Mobile Computing Systems and Applications, Bulletin of the IEEE Technical Committee on the Internet, November 1999.
  3. N. Anerousis, R. Cáceres, N. Duffield, A. Feldmann, A. Greenberg, C. Kalmanek, P. Mishra, K.K. Ramakrishnan, J. Rexford, Using the AT&T Labs PacketScope for Internet Measurement, Design, and Performance Analysis, Proc. of AT&T Services and Infrastructure Performance Symposium,, November 1997.
  4. R. Cáceres, IP to X.25 Protocol Interface Issues, CommUNIXations, Vol. 7, No. 3, May/June 1987.

Patents

  1. C. Narayanaswami, M. T. Raghunath, R. Cáceres and S. Berger, Sensor for Imaging Inside Equipment, U.S. Patent Application No. 10/874,022, filed June 22, 2004, pending,
  2. M. Raghunath, C. Narayanaswami, R. Cáceres and S. Berger, Portable Personal Computing Environment Technologies, U.S. Patent Application No. 10/795,153, filed March 5, 2004, pending,
  3. M. O. Rabin, D. Shasha, C. Bosley, R. Cáceres, A. Ingram, T. Karia, D. Molnar and Y. Beinart, Detection and Identification Methods for Software, U.S. Patent Application No. 10/815,985, filed April 1, 2004, pending, European Patent Application No. 05252071.5, filed April 1, 2004, pending.
  4. M. O. Rabin, D. Shasha, Y. Beinart, R. Cáceres, T. Karia, D. Molnar and S. Rolinson, Method and Apparatus for Protecting Information and Privacy, U.S. Patent Application No. 10/429,218, filed May 2, 2003, pending, European Patent Application No. 03747638.9, filed May 1, 2004, pending.
  5. D. G. Belanger, S. M. Bellovin, R. Cáceres and D. C. Nagel, Method for Reducing Congestion in Packet-Switched Networks, U.S. Patent No. 7,227,843, granted June 5, 2007.
  6. C. Blewett, R. Cáceres and J.C. Ramming, System And Method For Providing Wireless Services within a Wireless Local Area Network, U.S. Patent No. 7,130,612, granted October 31, 2006.
  7. R. Cáceres, B. Bershad, B. Marsh and F. Douglis, Method and System for Reducing Memory Access Latency by Providing Fine-Grained Direct Access to Flash Memory Concurrent with a Block Transfer Therefrom, U.S. Patent No. 5,802,554, granted September 1, 1998.

Mentoring and Teaching

  • Visiting Lecturer
  • Ph.D. Thesis Committee
  • Ph.D. Thesis Proposal Committee
  • Research Internship Mentor
    • A. Shakimov (Duke University), AT&T Labs, 2008.
    • S. T. Garriss (Carnegie Mellon University), IBM Research, 2006.
        Work resulted in multiple refereed publications.
    • C. M. Carter (University of Illinois at Urbana-Champaign), IBM Research, 2004.
        Work resulted in a refereed publication that won two Best Paper awards.
    • T. Friedman (University of Massachusetts at Amherst), AT&T Labs, 1999, 2000.
        Work resulted in multiple refereed publications and became part of Ph.D. dissertation.
    • Y. Chu (Carnegie Mellon University), AT&T Labs, 1999.
        Work resulted in a refereed publication.
    • S. B. Moon (University of Massachusetts at Amherst), AT&T Labs, 1998.
        Work resulted in multiple refereed publications and became part of Ph.D. dissertation.
    • J. Reason (University of California at Berkeley), AT&T Bell Labs, 1996.
    • V. Padmanabhan (University of California at Berkeley), AT&T Bell Labs, 1995.
        Work resulted in multiple refereed publications that have been cited more than 250 times.
    • L. Iftode (Princeton University), Matsushita Information Technology Lab, 1993.
        Work resulted in multiple refereed publications that have been cited more than 500 times.
  • Fellowship Selection
  • Tutor
  • Head Teaching Assistant

Awards and Honors

  • ACM Distinguished Scientist, for "Pioneering and influential research contributions in mobile computing, wireless networking, and network measurement", 2006.
  • IBM Pat Goldberg Memorial Best Paper Award in Computer Science, Electrical Engineering and Mathematics, for "Reincarnating PCs with Portable SoulPads", Proc. of 3rd ACM/USENIX International Conference on Mobile Systems, Applications and Services (MobiSys), 2005, with C. Carter, C. Narayanaswami and M. Raghunath.
  • ACM/USENIX MobiSys Best Paper Award, for "Reincarnating PCs with Portable SoulPads", Proc. of 3rd ACM/USENIX International Conference on Mobile Systems, Applications and Services (MobiSys), 2005, with C. Carter, C. Narayanaswami and M. Raghunath.
  • British Petroleum America Grant, 1988.
  • McGill University Faculty Scholar Award, 1982.
  • Carol Morgan School Alumnus of Merit, Santo Domingo, Dominican Republic, 2008.

Grants

  • Co-Principal Investigator, "MINC: Multicast-based Inference of Internal Network Characteristics," DARPA Next Generation Internet Program, approximately $1,500,000 USD, 1998-2001, with N. G. Duffield, J. Kurose, J. Horowitz, V. Paxson and D. Towsley.
  • Contributor to multiple grant proposals funded by the Corporation for National Research Initiatives and the State of California MICRO Program that helped fund my Ph.D. research, 1987-1992, with D. Ferrari.

Professional Activities

Service

Other activities

Last updated 28 March 2008.