Searching for authors named "Nikos Triandopoulos" – sorted by Relevance.
11 documents found, showing 1 through 10.
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Computational Bounds on Hierarchical Data Processing with Applications to Information Security
- …Motivated by algorithmic problems in the domain of information security, we study the complexity of a new class of computations over sets of elements. In this paper, we introduce hierarchical data processing, a generic class of problems for which, broadly speaking, the computation of a collection…
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Certification and Authentication of Data Structures
- …We study query authentication schemes, algorithmic and cryptographic constructions that provide efficient and secure protocols for verifying the results of queries over structured data in untrusted or adversarial data distribution environments. We formally define the problem in a new data query and …
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On the Cost of Authenticated Data Structures
- …Authenticated data structures provide a model for data authentication, where answers to queries contain extra information that can produce a cryptographic proof about the validity of the answers. In this paper, we study the authentication cost that is associated with this model when authenticatio…
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Privacy-Enhancing First-Price Auctions Using Rational Cryptography
- …We consider enhancing a sealed-bid single-item auction with privacy concerns, our assumption being that bidders primarily care about monetary payoff and secondarily worry about exposing information about their type to other players and learning information about other players ’ types. To treat priva…
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Resume
- …Teaching Assistant (Laboratory of Digital Systems) Feb 97-Jun 98 Distributed Data Authentication: design and analysis of Authenticated Data Structures CURRENT Multicast Security: design and analysis of new efficient schemes for Multicast Authentication RESEARCH Data Privacy: relation of PIR protocol…
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Multicast authentication in fully adversarial networks
- …We study a general version of the multicast authentication problem where the underlying network, controlled by an adversary, may drop chosen packets, rearrange the order of the packets in an arbitrary way, and inject new packets into the transmitted stream. Prior work on the problem has focused on l…
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People-Centric Urban Sensing: Security Challenges for the New Paradigm. Dartmouth
- …We study the security challenges that arise in people-centric urban sensing, a new sensor-networking paradigm that leverages humans as part of the sensing infrastructure. Most prior work on sensor networks has focused on collecting and processing ephemeral data about the environment using a static t…
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(Invited Paper)
- …Abstract—We study the security challenges that arise in opportunistic people-centric sensing, a new sensing paradigm leveraging humans as part of the sensing infrastructure. Most prior sensor-network research has focused on collecting and processing environmental data using a static topology and an …
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Multicast Authentication in Fully Adversarial Networks
- …We consider a general version of the multicast authentication problem, where we wish to authenticate a packet stream transmitted over a fully adversarial network. Namely, the network may drop chosen packets, rearrange the order of the packets, and inject new packets into the stream. If each packe…
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AnonySense: PrivacyAware People-Centric Sensing
- …Personal mobile devices are increasingly equipped with the capability to sense the physical world (through cameras, microphones, and accelerometers, for example) and the network world (with Wi-Fi and Bluetooth interfaces). Such devices offer many new opportunities for cooperative sensing application…
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