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Searching for authors named "Sotiris Ioannidis" – sorted by Relevance.

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  • Performance Evaluation of Privacy-Preserving Policy Reconciliation Protocols  
  • by Jonathan Voris, Sotiris Ioannidis, Susanne Wetzel
  • …The process of policy reconciliation allows multiple parties with possibly different policies to resolve differences in order to reach an agreement on an acceptable policy. Previous solutions for policy reconciliation required the participants to reveal their entire security policy in order to reach…
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  • Compromising Anonymity Using Packet Spinning  
  • by Elias Athanasopoulos, Sotiris Ioannidis, Evangelos P
  • …Abstract. We present a novel attack targeting anonymizing systems. The attack involves placing a malicious relay node inside an anonymizing system and keeping legitimate nodes “busy. ” We achieve this by creating circular circuits and injecting fraudulent packets, crafted in a way that will make the…
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  • Compiler and Run-Time Support for Adaptive Load Balancing in Software Distributed Shared Memory Systems  
  • by Sotiris Ioannidis, Sandhya Dwarkadas, Hya Dwarkadas — 1998 — In Proceedings of the Fourth Workshop on Languages, Compilers, and Run-Time Systems for Parallel Computing
  • …. Networks of workstations offer inexpensive and highly available high performance computing environments. A critical issue for achieving good performance in any parallel system is load balancing, even more so in workstation environments where the machines might be shared among many users. In this p…
  • Cited by 18 (3 self) – Add To MetaCart
  • Controlling Access to XML Documents over XML Native and Relational Databases  
  • by Lazaros Koromilas, George Chinis, Irini Fundulaki, Sotiris Ioannidis
  • …Abstract. In this paper we investigate the feasibility and efficiency of mapping XML data and access control policies onto relational and native XML databases for storage and querying. We developed a re-annotation algorithm that computes the XPath query which designates the XML nodes to be re-annota…
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  • On Using Network Memory to Improve the Performance of Transaction-Based Systems  
  • by Sotiris Ioannidis, Evangelos P. Markatos, Julia Sevaslidou — 1997 — In International Conference on Parallel and Distributed Processing Techniques and Applications (PDPTA ’98
  • …Transactions have been valued for their atomicity and recoverability properties that are useful to several systems, ranging from CAD environment to large-scale databases. Unfortunately, adding transaction support to an existing data repository was traditionally thought to be expensive, mostly due to…
  • Cited by 6 (2 self) – Add To MetaCart
  • CRAUL: Compiler and Run-Time Integration for Adaptation Under Load  
  • by Sotiris Ioannidis, Umit Rencuzogullari, Robert Stets, Sandhya Dwarkadas, Hya Dwarkadas — 1999 — Journal of Scienti Programming
  • …Clusters of workstations provide a cost-effective, high performance parallel computing environment. These environments, however, are often shared by multiple users, or may consist of heterogeneous machines. As a result, parallel applications executing in these environments must operate despite une…
  • Cited by 4 (2 self) – Add To MetaCart
  • Managing Access Control in Large Scale Heterogeneous Networks  
  • by Angelos Keromytis, Kostas Anagnostakis, Sotiris Ioannidis, Michael Greenwald, Jonathan Smith — 2003 — in Proceedings of the NATO NC3A Symposium on Interoperable Networks for Secure Communications (INSC
  • …The design principle of maximizing local autonomy except when it conflicts with global robustness has led to a scalable Internet with enormous heterogeneity of both applications and infrastructure. These properties have not been achieved in the mechanisms for specifying and enforcing security polici…
  • Cited by 1 (0 self) – Add To MetaCart
  • Implementing a Distributed Firewall  
  • by Sotiris Ioannidis Sotiris, Angelos D. Keromytis — 2000
  • …Conventional firewalls rely on topology restrictions and controlled network entry points to enforce traffic filtering. Furthermore, a firewall cannot filter traffic it does not see, so, effectively, everyone on the protected side is trusted. While this model has worked well for small to medium size …
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  • On Using Network RAM as a non-volatile Buffer  
  • by Dionisios Pnevmatikatos, Evangelos P. Markatos, Gregory Maglis, Sotiris Ioannidis — 1998 — In Cluster Computing
  • …File systems and databases usually make several synchronous disk write accesses in order to make sure that the disk always has a consistent view of their data, so that it can be recovered in the case of a system crash. Since synchronous disk operations are slow, some systems choose to employ asynchr…
  • Cited by 2 (0 self) – Add To MetaCart
  • WebDAVA: An Administrator-Free Approach to Web File-Sharing  
  • by Alexander Levine, Vassilis Prevelakis, John Ioannidis, Sotiris Ioannidis, Angelos D. Keromytis — 2003 — In Proceedings of the IEEE International Workshops on Enabling Technologies: Infrastructure for Collaborative Enterprises (WETICE), Workshop on Distributed and Mobile Collaboration
  • …Collaboration over the Internet depends on the ability of the members of a group to exchange data in a secure yet unobtrusive manner. WebDAVA is a system that allows users to define their own access-control policies to network resources that they control, enabling secure data sharing within an enter…
  • Cited by 2 (2 self) – Add To MetaCart
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