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    Total count: 15,000+ citations at Google Scholar. Get current listing from Google Scholar.

    Other links: DBLP ACM Arnetminer

    My h-index at Google Scholar is 60 (enumerated below). See Wikipedia entry on h-index.

    The most cited paper in Access Control with 5400+ citations at Google Scholar.

  1. Seminal RBAC paper: R. Sandhu et al, Role-Based Access Control Models, IEEE Computer, 29(2):38-47, Feb. 1996,
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    2. Paper with 2400+ citations at Google Scholar.

  2. RBAC Standard paper: D. Ferraiolo, R. Sandhu et al, Proposed NIST Standard for Role-Based Access Control, ACM Trans. on Information and System Security (TISSEC), 4(3): 224-274, Aug. 2001, Highlights
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    Also see ANSI INCITS 359-2004 Standard for Role Based Access Control

    3. Papers with 700+ citations at Google Scholar.

  3. R. Sandhu and P. Samarati, Access Control: Principles and Practice, IEEE Communications, 32(9): 40-48, Sept. 1994,
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  4. R. Sandhu et al, The NIST Model for Role-Based Access Control: Towards A Unified Standard, Proc. 5th ACM Workshop on Role-Based Access Control, Berlin, July 26-28, 2000, pages 47-63,
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  5. R. Sandhu et al, The ARBAC97 Model for Role-Based Administration of Roles, ACM Transactions on Information and System Security (TISSEC), 2(1): 105-135, Feb. 1999,
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    6. Papers with 600+ citations at Google Scholar.

  6. Jaehong Park and Ravi Sandhu. The UCON_ABC Usage Control Model, ACM Transactions on Information and System Security, Volume 7, Number 1, February 2004, pages 128-174.
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    7. Papers with 500+ citations at Google Scholar.

  7. R. Sandhu,  Lattice-Based Access Control Models, IEEE Computer, 26(11): 9-19, Nov. 1993,
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  8. S. Osborn, R. Sandhu and Q. Munawer. Configuring Role-Based Access Control to Enforce Mandatory and Discretionary Access Control Policies, ACM TISSEC, 3(2):85-106, May 2000.
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    9. Papers with 400+ citations at Google Scholar.

  9. G. Ahn and R. Sandhu. Role-Based Authorization Constraints Specification, ACM Transactions on Information & System Security (TISSEC), 3(4):207-226, Nov. 2000, Errata
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  10. R. Thomas and R. Sandhu, Task-based Authorization Controls (TBAC): A Family of Models for Active and Enterprise-oriented Authorization Management, Proc. 11th IFIP WG11.3 Working Conference on Database and Application Security, Lake Tahoe, California, August 1997, pages 262-275.
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    11. Papers with 300+ citations at Google Scholar.

  11. Ezedin Barka and Ravi Sandhu. Framework for Role-Based Delegation Models, Proc. 16th Annual Computer Security Applications Conference, New Orleans, Louisiana, Dec. 11-15, 2000, pages 168-176.
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    12. Papers with 250+ citations at Google Scholar.

  12. R. Sandhu, The Typed Access Matrix Model, Proc. IEEE Symposium on Research in Security and Privacy, Oakland, California, May 1992, pages 122-136.
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  13. R. Sandhu, Role Activation Hierarchies, Proc. Third ACM Workshop on Role-Based Access Control, Fairfax, Virginia, October 22-23, 1998, pages 33-40.
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  14. Joon Park, Ravi Sandhu and Gail-Joon Ahn. Role-Based Access Control on the Web, ACM Transactions on Information and Systems Security (TISSEC), Volume 4, Number 1, February 2001.
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  15. R. Sandhu, Role-Based Access Control, Adv. in Computers, 46:237-286, Academic Press 1998,
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  16. Jaehong Park and Ravi Sandhu, Towards Usage Control Models: Beyond Traditional Access Control, SACMAT 2002. Presentation
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    17. Papers with 200+ citations at Google Scholar.

  17. Sushil Jajodia and Ravi Sandhu, Toward a Multilevel Secure Relational Data Model, SIGMOD 1991.
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  18. Xinwen Zhang, Sejong Oh and Ravi Sandhu, PBDM: A Flexible Delegation Model in RBAC, SACMAT 2003.
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  19. Elisa Bertino and Ravi Sandhu, Database Security-Concepts, Approaches, and Challenges. IEEE Trans. Dependable Sec. Comput. 2(1): 2-19, 2005.
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  20. Ravi Sandhu, Role Hierarchies and Constraints for Lattice-Based Access Controls, ESORICS 1996.
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    21. Papers with 150+ citations at Google Scholar.

  21. Ravi Sandhu, Cryptographic Implementation of a Tree Hierarchy for Access Control, Information Processing Letters, Volume 27, Number 2, February 1988.
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  22. Ravi Sandhu, Transaction Control Expressions for Separation of Duties, ACSAC 1988.
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  23. Ravi Sandhu, The Schematic Protection Model: Its Definition and Analysis for Acyclic Attenuating Schemes , Journal of the ACM, Volume 35, Number 2, April 1988.
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  24. Ravi Sandhu, Rationale for the RBAC96 Family of Access Control Models, ACM RBAC 1995.
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  25. Ravi Sandhu and Jaehong Park, Usage Control: A Vision for Next Generation Access Control, MMM-ACNS 2003.
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  26. Ezedin Barka and Ravi Sandhu, A Role-Based Delegation Model and Some Extensions, NISSC 2000.
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    27. Papers with 100+ citations at Google Scholar.

  27. Ravi Sandhu and Qamar Munawer, How to do Discretionary Access Control Using Roles, ACM RBAC 1998.
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  28. Ravi Sandhu, Venkata Bhamidipadi, Edward Coyne, Srinivas Ganta and Charles Youman, The ARBAC97 Model for Role-Based Administration of Roles: Preliminary Description and Outline, ACM RBAC 1997.
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  29. Ravi Sandhu, Separation of Duties in Computerized Information Systems, IFIP11.3 1990.
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  30. Joon S. Park and Ravi Sandhu, Secure Cookies on the Web, IEEE Internet Computing, July 2000.
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  31. Sejong Oh, Ravi S. Sandhu, A Model for Role Administration Using Organization Structure, SACMAT 2002.
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  32. Ravi Sandhu and Xinwen Zhang, Peer-to-Peer Access Control Architecture Using Trusted Computing Technology, SACMAT 2005. Presentation
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  33. Gail-Joon Ahn and Ravi Sandhu, The RSL99 Language for Role-Based Separation of Duty Constraints, ACM RBAC 1999.
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  34. Ravi Sandhu, Edward Coyne, Hal Feinstein and Charles Youman, Role-Based Access Control: A Multi-Dimensional View, ACSAC 1994.
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  35. Ravi Sandhu and P. Samarati, Authentication, Access Control and Audit, ACM Computing Surveys, 50th anniversary commemorative issue, Volume 28, Number 1, March 1996.
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  36. Roshan Thomas and Ravi Sandhu, Conceptual Foundations for a Model of Task-based Authorizations, CSFW 1994.
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  37. Ravi Sandhu and Sushil Jajodia, Polyinstantiation Integrity in Multilevel Relations, OAKLAND 1990.
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  38. Ravi Sandhu and Qamar Munawer, The ARBAC99 Model for Administration of Roles, ACSAC 1999.
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  39. Mohammad A. Al-Kahtani and Ravi Sandhu, A Model for Attribute-Based User-Role Assignment, ACSAC 2002.
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  40. Fang Chen and Ravi Sandhu, Constraints for Role-Based Access Control, ACM RBAC 1995.
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  41. Ravi Sandhu and Fang Chen, The Multilevel Relational (MLR) Data Model, ACM Transactions on Information and Systems Security (TISSEC), Volume 1, Number 1,  June 1998.
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  42. Xinwen Zhang, Francesco Parisi-Presicce, Ravi Sandhu, and Jaehong Park, Formal Model and Policy Specification of Usage Control, ACM Transactions on Information and System Security (TISSEC), 8(4): 351-387, 2005
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  43. Tim Finin, Anupam Joshi, Lalana Kagal, Jianwei Niu, Ravi Sandhu, William Winsborough and Bhavani Thuraisingham, ROWLBAC: Representing Role Based Access Control in OWL, SACMAT 2008. Presentation
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  44. Gail-Joon Ahn, Myong Kang, Joon Park and Ravi Sandhu, Injecting RBAC to Secure a Web-Based Workflow System, ACM RBAC 2000.
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  45. Chandramouli Ramaswamy and Ravi Sandhu, Role-Based Access Control Features in Commercial Database Management Systems (Winner of Best Paper Award), NISSC 1998.
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    46. Papers with 75+ citations at Google Scholar.

  46. Pete Epstein and Ravi Sandhu, Towards a UML Based Approach to Role Engineering, ACM RBAC 1999.
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  47. Xinwen Zhang, Jaehong Park, Francesco Parisi-Presicce, Ravi Sandhu, A Logical Specification for Usage Control, SACMAT 2004.
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    48. Papers with 60+ citations at Google Scholar.

  48. Savith Kandala and Ravi Sandhu, Secure Role-Based Workflow Models, IFIP11.3 2001.
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  49. Ravi Sandhu, Kumar Ranganathan and Xinwen Zhang, Secure Information Sharing Enabled by Trusted Computing and PEI Models (Invited Talk), AsiaCCS 2006. Presentation
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  50. Ravi Sandhu, Engineering Authority and Trust in Cyberspace: The OM-AM and RBAC Way, ACM RBAC 2000.
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  51. Jaehong Park, Ravi Sandhu and James Schifalacqua, Security Architectures for Controlled Digital Information Dissemination, ACSAC 2000.
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  52. Ravi Sandhu and P. Samarati, Authentication, Access Control and Intrusion Detection, The Computer Science and Engineering Handbook, CRC Press 1997.
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  53. Joon S. Park and Ravi Sandhu, RBAC on the Web by Smart Certificates, ACM RBAC 1999.
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  54. Roshan Thomas and Ravi Sandhu, Towards a Task-Based Paradigm for Flexible and Adaptable Access Control in Distributed Applications, NSP 1993.
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  55. Joon S. Park and Ravi Sandhu, Binding Identities and Attributes Using Digitally Signed Certificates, ACSAC 2000.
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  56. Xinwen Zhang, Masayuki Nakae, Michael Covington and Ravi Sandhu, A Usage-based Authorization Framework for Collaborative Computing Systems, SACMAT 2006. Presentation
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    57. Papers with 50+ citations at Google Scholar.

  57. Jaehong Park and Ravi Sandhu, Originator Control in Usage Control, POLICY 2002.
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  58. Ravi Sandhu, Access Control: The Neglected Frontier (Keynote Lecture), ACISP 1996.
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  59. Ezedin Barka and Ravi Sandhu, Role-Based Delegation Model/ Hierarchical Roles (RBDM1), ACSAC 2004.
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  60. Elisa Bertino, Latifur Khan, Ravi Sandhu and Bhavani Thuraisingham, Secure Knowledge Management: Confidentiality, Trust, and Privacy, IEEE Transactions on Systems, Man and Cybernetics, Part A: Systems and Humans, 36(3):429-438, May 2006.
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    61. My h-index cuts off here at 60.

    My remaining papers (below my h-index) at Google Scholar.