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Nikita Borisov

  1. A Decentralized Architecture for Enforcing Privacy in Online Social Networks.

    Thu, 11/24/2011 - 15:01 — SomNambul
    Authors: Nikita Borisov, Sonia Jahid, Shirin Nilizadeh, Prateek Mittal, Apu Kapadia
    Subjects: Cryptography and Security
    Abstract

    A multitude of privacy breaches, both accidental and malicious, have prompted
    users to distrust centralized providers of online social networks (OSNs) and
    investigate decentralized solutions. We examine the design of a fully
    decentralized (peer-to-peer) OSN, with a special focus on privacy and security.
    In particular, we wish to protect the confidentiality, integrity, and
    availability of user content and the privacy of user relationships.

  2. Securing Tor Tunnels under the Selective-DoS Attack.

    Thu, 07/21/2011 - 15:01 — SomNambul
    Authors: Anupam Das, Nikita Borisov
    Subjects: Cryptography and Security
    Abstract

    Low-latency anonymous networks like Tor are subject to selective
    denial-of-service (DoS) attacks. Selective-DoS attacks lowers anonymity as it
    forces paths to be rebuilt multiple times to ensure delivery which increases
    the opportunity for more attack. In this paper we present a detection algorithm
    which filters out compromised tunnels from a set of Tor tunnels to ensure
    better anonymity. Our detection algorithm uses two levels of probing to filter
    out potential compromised tunnels.

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