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The ever increasing use and reliance upon computers in both the public and private sector has led to enormous numbers of computers being disposed of at the end of their useful life within an organisation. As the cost of computers has dropped, their use in the home has also continued to increase. In most organisations, computers have a relatively short life and are replaced on a regular basis with the result that, if not properly cleansed of data, they are released into the public domain containing data that can be relatively up to date. This problem is exacerbated by the increasing popularity and use of smart phones, which also contain significant storage capacity. From the results of the research it remains clear that the majority of organisations and private individuals that are using these computers still remain ignorant or misinformed of the potential volume and type of information that is stored on the hard disks contained within these systems. The evidence of the research is that neither organisations nor individuals have considered, or are aware of, the potential impact of the information that is contained in the disks from these systems becoming available to an unintended third party. This is the fifth study in an ongoing research programme being conducted into the levels and types of information that remain on computer hard disks that have been offered for sale on the second hand market. This ongoing research series has been Journal of Digital Forensics, Security and Law, Vol. 5(4) 44 undertaken to gain an understanding of the level and types of information that remains on these disks, to determine the damage that could potentially be caused if the information was misused, and to determine whether there are any developing trends. The disks used have been purchased in a number of countries. The rationale for this was to determine whether there are any national or regional differences in the way that computer disks are disposed of and to compare the results for any regional or temporal trends. The disks were obtained from a wide range of sources in each of the regions in order to minimise the effect of any action by an individual source. The first study was carried out in 2005 and since then has been repeated annually with the scope being incrementally extended to include additional research partners and countries. The study in 2009 was carried out by British Telecommunications (BT) and the University of Glamorgan in the UK, Edith Cowan University in Australia, Khalifa University in the United Arab Emirates and Longwood University in the USA. The core methodology of the research has remained unaltered throughout the duration of the study. The methodology has included the acquisition of a number of second hand computer disks from a range of sources and determining whether the data contained on the disks has been effectively erased or if they still contain information relating to previous owners. If information was found on the disks from which the previous user or owner could be identified, the research examined whether it was of a sensitive nature or in a sufficient volume to represent a risk. One of the consistent results of the research through the entire period has been that, for a significant proportion of the disks that have been examined, there was sufficient information present to pose a risk of a compromise of sensitive information to either the organisation or the individual that had previously used the disks. The potential impacts of the exposure of this information could include embarrassment to individuals and organisations, fraud, blackmail and identity theft. In every year since the study started, criminal activity has also been exposed. As has been stated in the previous reports, where the disks had originated from organisations, they had, in many cases, failed to meet their statutory, regulatory and legal obligations. In the 2009 study, the fifth in the series, the research methodology that had been followed in the previous studies was repeated, but in addition Khalifa University of Science Technology and research contributed to the analysis of the disks.

The 2009 Analysis of Information Remaining on Disks Offered for Sale on the Second Hand Market