Malicious Code and Spam in Wired and Wireless Environments: Problems and Solutions

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Over the last several years digital pests - namely viruses and spam - have reached epidemic proportions, severely impacting the usability of digital communication systems, primarily affecting email. These pests result in increased bandwidth usage, increased operating costs, potential security threats and above all decreased usability. They also have the potential to create Denial of Service attacks, crippling the networks that they infect or target. Whilst to date they have been mostly confined to email, it is becoming apparent that they have the potential to impact digital communications infrastructure of the future. For example, concerns have already been raised with regards to the potential impact of spam on Voice over IP. Spam and viruses have also been appearing within other technologies and communication media, including mobile phone networks and hand held devices. To combat the above mentioned security problems, we propose an email scanning gateway using open source tools, whilst ensuring that the gateway can be readily deployed in a commercial environment. In this paper we present details of the design and implementation, and discuss several possible applications of our proposed system
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