2,668 research outputs found
State of The Art and Hot Aspects in Cloud Data Storage Security
Along with the evolution of cloud computing and cloud storage towards matu-
rity, researchers have analyzed an increasing range of cloud computing security
aspects, data security being an important topic in this area. In this paper, we
examine the state of the art in cloud storage security through an overview of
selected peer reviewed publications. We address the question of defining cloud
storage security and its different aspects, as well as enumerate the main vec-
tors of attack on cloud storage. The reviewed papers present techniques for key
management and controlled disclosure of encrypted data in cloud storage, while
novel ideas regarding secure operations on encrypted data and methods for pro-
tection of data in fully virtualized environments provide a glimpse of the toolbox
available for securing cloud storage. Finally, new challenges such as emergent
government regulation call for solutions to problems that did not receive enough
attention in earlier stages of cloud computing, such as for example geographical
location of data. The methods presented in the papers selected for this review
represent only a small fraction of the wide research effort within cloud storage
security. Nevertheless, they serve as an indication of the diversity of problems
that are being addressed
BANZKP: a Secure Authentication Scheme Using Zero Knowledge Proof for WBANs
-Wireless body area network(WBAN) has shown great potential in improving
healthcare quality not only for patients but also for medical staff. However,
security and privacy are still an important issue in WBANs especially in
multi-hop architectures. In this paper, we propose and present the design and
the evaluation of a secure lightweight and energy efficient authentication
scheme BANZKP based on an efficient cryptographic protocol, Zero Knowledge
Proof (ZKP) and a commitment scheme. ZKP is used to confirm the identify of the
sensor nodes, with small computational requirement, which is favorable for body
sensors given their limited resources, while the commitment scheme is used to
deal with replay attacks and hence the injection attacks by committing a
message and revealing the key later. Our scheme reduces the memory requirement
by 56.13 % compared to TinyZKP [13], the comparable alternative so far for Body
Area Networks, and uses 10 % less energy
A Survey on Wireless Sensor Network Security
Wireless sensor networks (WSNs) have recently attracted a lot of interest in
the research community due their wide range of applications. Due to distributed
nature of these networks and their deployment in remote areas, these networks
are vulnerable to numerous security threats that can adversely affect their
proper functioning. This problem is more critical if the network is deployed
for some mission-critical applications such as in a tactical battlefield.
Random failure of nodes is also very likely in real-life deployment scenarios.
Due to resource constraints in the sensor nodes, traditional security
mechanisms with large overhead of computation and communication are infeasible
in WSNs. Security in sensor networks is, therefore, a particularly challenging
task. This paper discusses the current state of the art in security mechanisms
for WSNs. Various types of attacks are discussed and their countermeasures
presented. A brief discussion on the future direction of research in WSN
security is also included.Comment: 24 pages, 4 figures, 2 table
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
Wink: Deniable Secure Messaging
End-to-end encrypted (E2EE) messaging is an essential first step towards
combating increasingly privacy-intrusive laws. Unfortunately, it is vulnerable
to compelled key disclosure -- law-mandated, coerced, or simply by device
compromise. This work introduces Wink, the first plausibly-deniable messaging
system protecting message confidentiality even when users are coerced to hand
over keys/passwords. Wink can surreptitiously inject hidden messages in the
standard random coins (e.g., salt, IVs) used by existing E2EE protocols. It
does so as part of legitimate secure cryptographic functionality deployed
inside widely-available trusted execution environments (TEEs) such as
TrustZone. This provides a powerful mechanism for hidden untraceable
communication using virtually unchanged unsuspecting existing E2EE messaging
apps, as well as strong plausible deniability. Wink has been demonstrated with
multiple existing E2EE applications (including Telegram and Signal) with
minimal (external) instrumentation, negligible overheads, and crucially without
changing on-wire message formats
MemShield: GPU-assisted software memory encryption
Cryptographic algorithm implementations are vulnerable to Cold Boot attacks,
which consist in exploiting the persistence of RAM cells across reboots or
power down cycles to read the memory contents and recover precious sensitive
data. The principal defensive weapon against Cold Boot attacks is memory
encryption. In this work we propose MemShield, a memory encryption framework
for user space applications that exploits a GPU to safely store the master key
and perform the encryption/decryption operations. We developed a prototype that
is completely transparent to existing applications and does not require changes
to the OS kernel. We discuss the design, the related works, the implementation,
the security analysis, and the performances of MemShield.Comment: 14 pages, 2 figures. In proceedings of the 18th International
Conference on Applied Cryptography and Network Security, ACNS 2020, October
19-22 2020, Rome, Ital
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