12,934 research outputs found
SecMon: End-to-End Quality and Security Monitoring System
The Voice over Internet Protocol (VoIP) is becoming a more available and
popular way of communicating for Internet users. This also applies to
Peer-to-Peer (P2P) systems and merging these two have already proven to be
successful (e.g. Skype). Even the existing standards of VoIP provide an
assurance of security and Quality of Service (QoS), however, these features are
usually optional and supported by limited number of implementations. As a
result, the lack of mandatory and widely applicable QoS and security guaranties
makes the contemporary VoIP systems vulnerable to attacks and network
disturbances. In this paper we are facing these issues and propose the SecMon
system, which simultaneously provides a lightweight security mechanism and
improves quality parameters of the call. SecMon is intended specially for VoIP
service over P2P networks and its main advantage is that it provides
authentication, data integrity services, adaptive QoS and (D)DoS attack
detection. Moreover, the SecMon approach represents a low-bandwidth consumption
solution that is transparent to the users and possesses a self-organizing
capability. The above-mentioned features are accomplished mainly by utilizing
two information hiding techniques: digital audio watermarking and network
steganography. These techniques are used to create covert channels that serve
as transport channels for lightweight QoS measurement's results. Furthermore,
these metrics are aggregated in a reputation system that enables best route
path selection in the P2P network. The reputation system helps also to mitigate
(D)DoS attacks, maximize performance and increase transmission efficiency in
the network.Comment: Paper was presented at 7th international conference IBIZA 2008: On
Computer Science - Research And Applications, Poland, Kazimierz Dolny
31.01-2.02 2008; 14 pages, 5 figure
PKI Safety Net (PKISN): Addressing the Too-Big-to-Be-Revoked Problem of the TLS Ecosystem
In a public-key infrastructure (PKI), clients must have an efficient and
secure way to determine whether a certificate was revoked (by an entity
considered as legitimate to do so), while preserving user privacy. A few
certification authorities (CAs) are currently responsible for the issuance of
the large majority of TLS certificates. These certificates are considered valid
only if the certificate of the issuing CA is also valid. The certificates of
these important CAs are effectively too big to be revoked, as revoking them
would result in massive collateral damage. To solve this problem, we redesign
the current revocation system with a novel approach that we call PKI Safety Net
(PKISN), which uses publicly accessible logs to store certificates (in the
spirit of Certificate Transparency) and revocations. The proposed system
extends existing mechanisms, which enables simple deployment. Moreover, we
present a complete implementation and evaluation of our scheme.Comment: IEEE EuroS&P 201
Reconfigurable Security: Edge Computing-based Framework for IoT
In various scenarios, achieving security between IoT devices is challenging
since the devices may have different dedicated communication standards,
resource constraints as well as various applications. In this article, we first
provide requirements and existing solutions for IoT security. We then introduce
a new reconfigurable security framework based on edge computing, which utilizes
a near-user edge device, i.e., security agent, to simplify key management and
offload the computational costs of security algorithms at IoT devices. This
framework is designed to overcome the challenges including high computation
costs, low flexibility in key management, and low compatibility in deploying
new security algorithms in IoT, especially when adopting advanced cryptographic
primitives. We also provide the design principles of the reconfigurable
security framework, the exemplary security protocols for anonymous
authentication and secure data access control, and the performance analysis in
terms of feasibility and usability. The reconfigurable security framework paves
a new way to strength IoT security by edge computing.Comment: under submission to possible journal publication
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 Multi-User, Single-Authentication Protocol for Smart Grid Architectures
open access articleIn a smart grid system, the utility server collects data from various smart grid devices. These data play an important role in the energy distribution and balancing between the energy providers and energy consumers. However, these data are prone to tampering attacks by an attacker, while traversing from the smart grid devices to the utility servers, which may result in energy disruption or imbalance. Thus, an authentication is mandatory to efficiently authenticate the devices and the utility servers and avoid tampering attacks. To this end, a group authentication algorithm is proposed for preserving demandâresponse security in a smart grid. The proposed mechanism also provides a fine-grained access control feature where the utility server can only
access a limited number of smart grid devices. The initial authentication between the utility server and smart grid device in a group involves a single public key operation, while the subsequent authentications with the same device or other devices in the same group do not need a public key operation. This reduces the overall computation and communication overheads and takes less time to successfully establish a secret session key, which is used to exchange sensitive information over an unsecured wireless channel. The resilience of the proposed algorithm is tested against various attacks using formal and informal security analysis
Monitoring data in R with the lumberjack package
Monitoring data while it is processed and transformed can yield detailed
insight into the dynamics of a (running) production system. The lumberjack
package is a lightweight package allowing users to follow how an R object is
transformed as it is manipulated by R code. The package abstracts all logging
code from the user, who only needs to specify which objects are logged and what
information should be logged. A few default loggers are included with the
package but the package is extensible through user-defined logger objects.Comment: Accepted for publication in the Journal of Statistical Softwar
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