Energy-Constrained Quality Optimization for Secure Image Transmission in Wireless Sensor Networks

Abstract

Resource allocation for multimedia selective encryption and energy efficient transmission has not been fully investigated in literature for wireless sensor networks (WSNs). In this article, we propose a new cross-layer approach to optimize selectively encrypted image transmission quality in WSNs with strict energy constraint. A new selective image encryption approach favorable for unequal error protection (UEP) is proposed, which reduces encryption overhead considerably by controlling the structure of image bitstreams. Also, a novel cross-layer UEP scheme based on cipher-plain-text diversity is studied. In this UEP scheme, resources are unequally and optimally allocated in the encrypted bitstream structure, including data position information and magnitude value information. Simulation studies demonstrate that the proposed approach can simultaneously achieve improved image quality and assured energy efficiency with secure transmissions over WSNs.

A Fast Enhanced Secure Image Chaotic Cryptosystem Based on Hybrid Chaotic Magic Transform

“…However, authors have not addressed security issues: histogram analysis, pixel correlation, chart test, and entropy. In [8], a new cross-layer unequal error protection (UEP) is introduced which reduces image encryption overhead and controls the image bit stream structure to deliver the image data in wireless sensor networks. This paper assures energy competence and image security and quality over the image transmission in wireless network channels.…”

Robust Video Transmission over Wireless Networks Using Cross Layer Approach

“…An Unequal Error Protection (UEP) technique was proposed for image data by considering the image position and value diversity. In references [7] and [8] the image authentication was proposed for single image. These methods can be extended to the video signal by considering the temporal correlation and dependency of the video frames.…”

Cooperative communications with relay selection for wireless networks: design issues and applications

“…In these mission-critical applications, a set of QoS requirements, for example, delay, packet delivery ratio, network lifetime, throughput, and communication bandwidth, on network performances must be satisfied [42]. However, providing guaranteed QoS is almost impossible in dynamic WSNs [43,44], because of the dynamic network topology, time-varying wireless medium, and severe constraints on power supply, computation power, and communication bandwidth [45][46][47][48][49][50].…”