Abstract-Cloud computing enables the sharing of resources such as storage, network, applications and software through internet. Cloud users can lease multiple resources according to their requirements, and pay only for the services they use. However, despite all cloud benefits there are many security concerns related to hardware, virtualization, network, data and service providers that act as a significant barrier in the adoption of cloud in the IT industry. In this paper, we survey the top security concerns related to cloud computing. For each of these security threats we describe, i) how it can be used to exploit cloud components and its effect on cloud entities such as providers and users, and ii) the security solutions that must be taken to prevent these threats. These solutions include the security techniques from existing literature as well as the best security practices that must be followed by cloud administrators.

IPv4 addressing space has almost been exhausted;many organisations will soon be required to perform thechangeover to IPv6. Traditional IPv4 routing protocols must bereplaced with new IPv6 compatible protocols to ensure systemscontinue to operate effectively; however these protocols haveundergone significant changes in order to support IPv6.Understanding these changes is important when selecting arouting protocol for a system, in order to facilitate this, a studyand comparison of two popular routing protocols; OSPF andEIGRP has been undertaken. The major changes between theIPv4 and IPv6 editions have been identified and discussed andthe two protocols have been compared against a number ofcriteri

Several popular lossless image compression algorithms were evaluated for the application of compressing medical infrared images. Lossless JPEG, JPEG-LS,JPEG2000, PNG, and CALIC were tested on an image dataset of 380+ thermal images. The results show that JPEG-LS is the algorithm with the best performance, both in terms of compression ratio and compression speed.

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