The Role of Penetration Testing in Forensic Multimedia Retrieval Process

Digital forensic investigators are faced with multimedia retrieval and discovery challenges that require innovation and application of evolving methodologies. This work is made more difficult in critical infra-structure environments where the acquired evidence is in many formats, types and presentations. Penetration testing is one of the techniques used to focus an investigation and to target the potential case information from the vulnerability identification phase, through to the media identification phase. In this chapter a review of these processes is made and a framework example developed to show how the investigator discovers relevant evidence. The problem for the digital investigator is the vast array of media in which evidence is stored or transmitted. Some work is from live retrieval and others static. A framework of methods that is flexible and adaptable to the context of investigation is proposed and the discovery methods for multimedia environments elaborated

Development of an objective evaluation framework with subjective impact

Multimedia technologies are finding new and advanced uses within the modern organisation. From a strategic perspective, these organisations realise techhology contributes to enhance productivity and operational success. However, to embrace technology without recourse to those who ultimately utilise such facilities, could effectively jeopardize the up-take of new improved working practices. Sir Paul Condon: Commissioner of Police for the Metropolis has been noted within MetView (1999) for the following statements: • “Technology is playing an ever increasing role in modern policing methods and has been responsible for many of our current successes” • "Good and innovative policing, and good and innovative technology cannot be separated”. To continue this success there is a need within a modern policing organisation to develop an objective framework for evaluating multimedia technologies. This framework will give recognition to subjective user issues that are necessary to contribute towards the partnership that exists between innovative policing and innovative technology. This research presents a framework that achieves specific business requirements outlined by a technology aware department within a police organisation. Three research objectives were completed. These objectives are: - Provide a business process for evaluating multimedia technologies in a way that is repeatable and unbiased - Provide a sound foundation that accounts for the typical user of multimedia technologies - Aid towards increased user satisfaction and confidence. Conclusions detail the objective evaluation framework with subjective impact, reference to a business process and considerations for a modern policing organisation on a way forwardMRe

Optimized Lossless Embedded Compression for Mobile Multimedia Applications

Power consumption is a critical design factor in modern mobile chip design, in which the memory system with dynamic random-access memory (DRAM) consumes more than half of the entire system’s power. Without DRAM bandwidth compression, extreme multimedia operations such as 8K high dynamic range (HDR) recording and 8K video conference calling are not possible without sacrificing image quality or trimming because of thermal limitations or battery time sustainability constraints. Since heterogeneous processors are substantially involved in managing various types of fallbacks or software solutions, complicated compression algorithms for high-compression ratios are not actually adaptable owing to timing closure problems or high throughput requirements. In this paper, we propose evaluation metrics to assess lossless embedded compression (LEC) algorithms to reflect realistic design considerations for mobile multimedia scenarios. Furthermore, we introduce an optimized LEC implementation for contemporary multimedia applications in mobile devices based on the proposed metrics. The proposed LEC implementation enhances the compression ratio of LEC algorithms in other commercial application processors for contemporary premium smartphones by up to 9.2% on average, while maintaining the same timing closure condition