Conference Papers

Permanent URI for this collectionhttps://idr.nitk.ac.in/handle/123456789/28506

Browse

Author: search.filters.author.Shashank, D.

Search Results

Now showing 1 - 3 of 3
  • No Thumbnail Available
    Item
    Factor analysis methods for joint speaker verification and spoof detection
    (Institute of Electrical and Electronics Engineers Inc., 2017) Dhanush, B.K.; Suparna, S.; Aarthy, R.; Likhita, C.; Shashank, D.; Harish, H.; Ganapathy, S.
    The performance of a speaker verification system is severely degraded by spoofing attacks generated from artificial speech synthesizers. Recently, several approaches have been proposed for classifying natural and synthetic speech (spoof detection) which can be used in conjunction with a speaker verification system. In this paper, we attempt to develop a joint modelling approach which can detect the presence of spoofing attacks while also performing the speaker verification task. We propose a factor modelling approach where the spoof variability subspace and the speaker variability subspace are jointly trained. The lower dimensional projections in these subspaces are used for speaker verification as well as spoof detection tasks. We also investigate the benefits of linear discriminant analysis (LDA), widely used in speaker recognition, for the spoof detection task. Several experiments are performed using the speaker and spoofing (SAS) database. For speaker verification, we compare the performance of the proposed method with a baseline method of fusing a conventional speaker verification system and a spoof detection system. In these experiments, the proposed approach provides substantial improvements for spoof detection (relative improvements of 20% in EER over the baseline) as well as speaker verification under spoofing conditions (relative improvements of 40% in EER over the baseline). © 2017 IEEE.
  • No Thumbnail Available
    Item
    TinTin: Tiny In-Network Transport for High Precision INdustrial Communication
    (IEEE Computer Society, 2022) Makhijani, K.; Kataria, B.; Shashank, D.; Devkota, D.; Tahiliani, M.P.
    The design of a transport protocol for high precision industrial networks is a complex problem since the industrial applications are resource-critical, time-critical, session-less, and safety-critical. These requirements make existing end-to-end transport mechanisms unsuitable for use in the industry verticals that require control-systems type communication. This paper proposes a lightweight, connection-less, and reliable protocol called TinTin. It utilizes the in-network capabilities to compensate for end device constraints. The mechanisms adopted in TinTin aim to reduce the communication overheads associated with well-known connection-oriented protocols. This paper discusses the design considerations of TinTin in detail and presents an early stage proof-of-concept implementation of TinTin with New IP. © 2022 IEEE.
  • No Thumbnail Available
    Item
    Implementation of NAT44 and NAT64 using TC-BPF and eXpress Data Path (XDP)
    (Institute of Electrical and Electronics Engineers Inc., 2022) Shashank, D.; Kataria, B.; Sohoni, A.; Tahiliani, M.P.
    Large number of new devices connecting to the Internet has overwhelmed the available IPv4 address space. With devices that are IPv6 enabled, there is a need to translate their addresses to IPv4 so that they can communicate with servers that use IPv4. Network Address Translation (NAT) solves this problem by mapping IPv6 addresses to IPv4 and performing the translation at the router between the IPv4-enabled client and IPv6-enabled server. This is called NAT64. NAT is currently used by most of the Internet Service Providers (ISPs) around the world. However, most of the existing implementations involve a lot of kernel overhead. eXpress Data Path (XDP) is a relatively new concept that lets packets be processed faster than the normal network stack. It requires a modification to the kernel and allows packets to move through an integrated fast path in the kernel stack. XDP-NAT is being treated as a feasible alternative to the traditional NAT implementations, owing to its advantages such as low processing overhead and easy implementation. This work focuses on using the packet processing capabilities of XDP to perform address translation. This paper describes the design and a proof-of-concept implementation of NAT64 using XDP. © 2022 IEEE.