4,288 research outputs found
HDR Image Watermarking
In this Chapter we survey available solutions for HDR image watermarking. First, we briefly discuss watermarking in general terms, with particular emphasis on its requirements that primarily include security, robustness, imperceptibility, capacity and the availability of the original image during recovery. However, with respect to traditional image watermarking, HDR images possess a unique set of features such as an extended range of luminance values to work with and tone-mapping operators against whom it is essential to be robust. These clearly affect the HDR watermarking algorithms proposed in the literature, which we extensively review next, including a thorough analysis of the reported experimental results. As a working example, we also describe the HDR watermarking system that we recently proposed and that focuses on combining imperceptibility, security and robustness to TM operators at the expense of capacity. We conclude the chapter with a critical analysis of the current state and future directions of the watermarking applications in the HDR domain
Deep Learning-Based Dynamic Watermarking for Secure Signal Authentication in the Internet of Things
Securing the Internet of Things (IoT) is a necessary milestone toward
expediting the deployment of its applications and services. In particular, the
functionality of the IoT devices is extremely dependent on the reliability of
their message transmission. Cyber attacks such as data injection,
eavesdropping, and man-in-the-middle threats can lead to security challenges.
Securing IoT devices against such attacks requires accounting for their
stringent computational power and need for low-latency operations. In this
paper, a novel deep learning method is proposed for dynamic watermarking of IoT
signals to detect cyber attacks. The proposed learning framework, based on a
long short-term memory (LSTM) structure, enables the IoT devices to extract a
set of stochastic features from their generated signal and dynamically
watermark these features into the signal. This method enables the IoT's cloud
center, which collects signals from the IoT devices, to effectively
authenticate the reliability of the signals. Furthermore, the proposed method
prevents complicated attack scenarios such as eavesdropping in which the cyber
attacker collects the data from the IoT devices and aims to break the
watermarking algorithm. Simulation results show that, with an attack detection
delay of under 1 second the messages can be transmitted from IoT devices with
an almost 100% reliability.Comment: 6 pages, 9 figure
Lime: Data Lineage in the Malicious Environment
Intentional or unintentional leakage of confidential data is undoubtedly one
of the most severe security threats that organizations face in the digital era.
The threat now extends to our personal lives: a plethora of personal
information is available to social networks and smartphone providers and is
indirectly transferred to untrustworthy third party and fourth party
applications.
In this work, we present a generic data lineage framework LIME for data flow
across multiple entities that take two characteristic, principal roles (i.e.,
owner and consumer). We define the exact security guarantees required by such a
data lineage mechanism toward identification of a guilty entity, and identify
the simplifying non repudiation and honesty assumptions. We then develop and
analyze a novel accountable data transfer protocol between two entities within
a malicious environment by building upon oblivious transfer, robust
watermarking, and signature primitives. Finally, we perform an experimental
evaluation to demonstrate the practicality of our protocol
A Survey of Digital Watermarking Techniques and its Applications
Digital media is the need of a people now a day as the alternate of paper
media.As the technology grown up digital media required protection while
transferring through internet or others mediums.Watermarking techniques have
been developed to fulfill this requirement.This paper aims to provide a
detailed survey of all watermarking techniques specially focuses on image
watermarking types and its applications in today world.Comment: 4 Page
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