18,652 research outputs found
An Authentication Protocol for Future Sensor Networks
Authentication is one of the essential security services in Wireless Sensor
Networks (WSNs) for ensuring secure data sessions. Sensor node authentication
ensures the confidentiality and validity of data collected by the sensor node,
whereas user authentication guarantees that only legitimate users can access
the sensor data. In a mobile WSN, sensor and user nodes move across the network
and exchange data with multiple nodes, thus experiencing the authentication
process multiple times. The integration of WSNs with Internet of Things (IoT)
brings forth a new kind of WSN architecture along with stricter security
requirements; for instance, a sensor node or a user node may need to establish
multiple concurrent secure data sessions. With concurrent data sessions, the
frequency of the re-authentication process increases in proportion to the
number of concurrent connections, which makes the security issue even more
challenging. The currently available authentication protocols were designed for
the autonomous WSN and do not account for the above requirements. In this
paper, we present a novel, lightweight and efficient key exchange and
authentication protocol suite called the Secure Mobile Sensor Network (SMSN)
Authentication Protocol. In the SMSN a mobile node goes through an initial
authentication procedure and receives a re-authentication ticket from the base
station. Later a mobile node can use this re-authentication ticket when
establishing multiple data exchange sessions and/or when moving across the
network. This scheme reduces the communication and computational complexity of
the authentication process. We proved the strength of our protocol with
rigorous security analysis and simulated the SMSN and previously proposed
schemes in an automated protocol verifier tool. Finally, we compared the
computational complexity and communication cost against well-known
authentication protocols.Comment: This article is accepted for the publication in "Sensors" journal. 29
pages, 15 figure
Initial Parton Distribution just after Heavy Ion Collisions
We study the initial distribution of a parton system which is formed just
after relativistic heavy ion collision by the elastic scattering among the
constituent partons in details and analyze the baryon and strangeness contents
of the primary parton system. We present the rapidity and energy distributions
of the system.Comment: 17 page
Continuous Authentication for Voice Assistants
Voice has become an increasingly popular User Interaction (UI) channel,
mainly contributing to the ongoing trend of wearables, smart vehicles, and home
automation systems. Voice assistants such as Siri, Google Now and Cortana, have
become our everyday fixtures, especially in scenarios where touch interfaces
are inconvenient or even dangerous to use, such as driving or exercising.
Nevertheless, the open nature of the voice channel makes voice assistants
difficult to secure and exposed to various attacks as demonstrated by security
researchers. In this paper, we present VAuth, the first system that provides
continuous and usable authentication for voice assistants. We design VAuth to
fit in various widely-adopted wearable devices, such as eyeglasses,
earphones/buds and necklaces, where it collects the body-surface vibrations of
the user and matches it with the speech signal received by the voice
assistant's microphone. VAuth guarantees that the voice assistant executes only
the commands that originate from the voice of the owner. We have evaluated
VAuth with 18 users and 30 voice commands and find it to achieve an almost
perfect matching accuracy with less than 0.1% false positive rate, regardless
of VAuth's position on the body and the user's language, accent or mobility.
VAuth successfully thwarts different practical attacks, such as replayed
attacks, mangled voice attacks, or impersonation attacks. It also has low
energy and latency overheads and is compatible with most existing voice
assistants
Effective Caching for the Secure Content Distribution in Information-Centric Networking
The secure distribution of protected content requires consumer authentication
and involves the conventional method of end-to-end encryption. However, in
information-centric networking (ICN) the end-to-end encryption makes the
content caching ineffective since encrypted content stored in a cache is
useless for any consumer except those who know the encryption key. For
effective caching of encrypted content in ICN, we propose a novel scheme,
called the Secure Distribution of Protected Content (SDPC). SDPC ensures that
only authenticated consumers can access the content. The SDPC is a lightweight
authentication and key distribution protocol; it allows consumer nodes to
verify the originality of the published article by using a symmetric key
encryption. The security of the SDPC was proved with BAN logic and Scyther tool
verification.Comment: 7 pages, 9 figures, 2018 IEEE 87th Vehicular Technology Conference
(VTC Spring
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