This paper focuses on securing zone routing protocol (ZRP) from
one of the most possible attacks such as bogus route attack and
black hole attack. This paper provides a solution against this attack
using identity based cryptography(IBC), We implement, evaluate
our proposal using NS-2 network Simulator.
The majority of recent digital signature algorithms depend, in their
structure, on complicated mathematical concepts that require a long
time and a significant computational effort to be executed. As a
trial to reduce these problems, some researchers have proposed
digital signature algorithms which depend on simple arithmetic
functions and operations that are executed quickly, but that was at
the expense of the security of algorithms.
Recently، digital image authentication technologies have gained much attention because of
their importance in many multimedia applications. In general digital images are
transmitted over unsaved media such as the internet and many types of computer
networks.
Applications may require a large amount of safety such as military applications and
medical applications. Therefore the digital images must be protected against any
modifications، which may lead to influence the decisions that associated with them.
In this paper، a general scheme based on Steganography & Perceptual Image Hashing
techniques was proposed to enhance the security of digital image transmission. In the final
test stage, we checked the accuracy of the proposed scheme against potential modifications
was studied, by applying different levels of compression and changing the contrast &
brightness level of the image. For analyzing the final results, we computed the matching
ratio between the original hash vector and the embedded hash vector. As a result، we
achieved a near perfect match ratio even after applying the image compression level or
changing its brightness level (approximately 99.9%), while the match ratio decreased
significantly with the increase of the contrast level of the image (approximately 94%).
