1,172 research outputs found
Secure spontaneous emergency access to personal health record
We propose a system which enables access to the user's Personal Health Record (PHR) in the event of emergency. The
access typically occurs in an ad-hoc and spontaneous manner and the user is usually unconscious, hence rendering the
unavailability of the user's password to access the PHR. The
proposed system includes a smart card carried by the user
at all time and it is personalized with a pseudo secret, an
URL to the PHR Server, a secret key shared with the PHR
Server and a number of redemption tokens generated using
a hash chain. In each emergency session, a one-time use
redemption token is issued by the smart card, allowing the
emergency doctor to retrieve the user's PHR upon successful authentication of his credentials and validation of the
redemption token. The server returns the PHR encrypted
with a one-time session key which can only be decrypted by
the emergency doctor. The devised interaction protocol to
facilitate emergency access to the user's PHR is secure and
efficient
Security and Privacy Issues in Wireless Mesh Networks: A Survey
This book chapter identifies various security threats in wireless mesh
network (WMN). Keeping in mind the critical requirement of security and user
privacy in WMNs, this chapter provides a comprehensive overview of various
possible attacks on different layers of the communication protocol stack for
WMNs and their corresponding defense mechanisms. First, it identifies the
security vulnerabilities in the physical, link, network, transport, application
layers. Furthermore, various possible attacks on the key management protocols,
user authentication and access control protocols, and user privacy preservation
protocols are presented. After enumerating various possible attacks, the
chapter provides a detailed discussion on various existing security mechanisms
and protocols to defend against and wherever possible prevent the possible
attacks. Comparative analyses are also presented on the security schemes with
regards to the cryptographic schemes used, key management strategies deployed,
use of any trusted third party, computation and communication overhead involved
etc. The chapter then presents a brief discussion on various trust management
approaches for WMNs since trust and reputation-based schemes are increasingly
becoming popular for enforcing security in wireless networks. A number of open
problems in security and privacy issues for WMNs are subsequently discussed
before the chapter is finally concluded.Comment: 62 pages, 12 figures, 6 tables. This chapter is an extension of the
author's previous submission in arXiv submission: arXiv:1102.1226. There are
some text overlaps with the previous submissio
FAIR: Forwarding Accountability for Internet Reputability
This paper presents FAIR, a forwarding accountability mechanism that
incentivizes ISPs to apply stricter security policies to their customers. The
Autonomous System (AS) of the receiver specifies a traffic profile that the
sender AS must adhere to. Transit ASes on the path mark packets. In case of
traffic profile violations, the marked packets are used as a proof of
misbehavior.
FAIR introduces low bandwidth overhead and requires no per-packet and no
per-flow state for forwarding. We describe integration with IP and demonstrate
a software switch running on commodity hardware that can switch packets at a
line rate of 120 Gbps, and can forward 140M minimum-sized packets per second,
limited by the hardware I/O subsystem.
Moreover, this paper proposes a "suspicious bit" for packet headers - an
application that builds on top of FAIR's proofs of misbehavior and flags
packets to warn other entities in the network.Comment: 16 pages, 12 figure
Access Management in Lightweight IoT: A Comprehensive review of ACE-OAuth framework
With the expansion of Internet of Things (IoT), the need for secure and scalable authentication and
authorization mechanism for resource-constrained devices is becoming increasingly important. This
thesis reviews the authentication and authorization mechanisms in resource-constrained Internet of
Things (IoT) environments. The thesis focuses on the ACE-OAuth framework, which is a lightweight
and scalable solution for access management in IoT. Traditional access management protocols are not
well-suited for the resource-constrained environment of IoT devices. This makes the lightweight
devices vulnerable to cyber-attacks and unauthorized access. This thesis explores the security
mechanisms and standards, the protocol flow and comparison of ACE-OAuth profiles. It underlines
their potential risks involved with the implementation. The thesis delves into the existing and
emerging trends technologies of resource-constrained IoT and identifies limitations and potential
threats in existing authentication and authorization methods.
Furthermore, comparative analysis of ACE profiles demonstrated that the DTLS profile enables
constrained servers to effectively handle client authentication and authorization. The OSCORE
provides enhanced security and non-repudiation due to the Proof-of-Possession (PoP) mechanism,
requiring client to prove the possession of cryptographic key to generate the access token.
The key findings in this thesis, including security implications, strengths, and weaknesses for ACE
OAuth profiles are covered in-depth. It shows that the ACE-OAuth framework’s strengths lie in its
customization capabilities and scalability. This thesis demonstrates the practical applications and
benefits of ACE-OAuth framework in diverse IoT deployments through implementation in smart
home and factory use cases. Through these discussions, the research advances the application of
authentication and authorization mechanisms and provides practical insights into overcoming the
challenges in constrained IoT settings
Security and Authentication for 802.11 Wireless Networks
Wireless Networks is a very growing market. However, the security measures are not strong enough; the WEP security protocol is flawed. The 802.11 Task Group I is working on new security measures in order to strengthen the access control of users, the privacy and the integrity of data. We will describe the WEP flaws and the new security measures of 802.11 Task Group I. Finally, we will propose a new architecture to improve user identification for the wireless network of our department
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