A table of 95%confidence limits on the probabilities for randomly downloading relatively small numbers of illegal images or sensitive documents amongst a relatively large number of other images or documents has been c...A table of 95%confidence limits on the probabilities for randomly downloading relatively small numbers of illegal images or sensitive documents amongst a relatively large number of other images or documents has been computed.It is anticipated that these data will assist prosecution officials in arriving at a decision as to whether or not there is a reasonable likelihood of a successful criminal prosecution when the inadvertent download defence is employed in cases of possession of child pornography,terrorist material or espionage-related documents.The same data can also be used by defence counsels to assess the strength of the prosecution’s case.展开更多
Unlike conventional forensics,digital forensics does not at present generally quantify the results of its investigations.It is suggested that digital forensics should aim to catch up with other forensic disciplines by...Unlike conventional forensics,digital forensics does not at present generally quantify the results of its investigations.It is suggested that digital forensics should aim to catch up with other forensic disciplines by using Bayesian and other numerical methodologies to quantify its investigations’results.Assessing the plausibility of alternative hypotheses(or propositions,or claims)which explain how recovered digital evidence came to exist on a device could assist both the prosecution and the defence sides in criminal proceedings:helping the prosecution to decide whether to proceed to trial and helping defence lawyers to advise a defendant how to plead.This paper reviews some numerical approaches to the goal of quantifying the relative weights of individual items of digital evidence and the plausibility of hypotheses based on that evidence.The potential advantages enabling the construction of cost-effective digital forensic triage schemas are also outlined.展开更多
文摘A table of 95%confidence limits on the probabilities for randomly downloading relatively small numbers of illegal images or sensitive documents amongst a relatively large number of other images or documents has been computed.It is anticipated that these data will assist prosecution officials in arriving at a decision as to whether or not there is a reasonable likelihood of a successful criminal prosecution when the inadvertent download defence is employed in cases of possession of child pornography,terrorist material or espionage-related documents.The same data can also be used by defence counsels to assess the strength of the prosecution’s case.
文摘Unlike conventional forensics,digital forensics does not at present generally quantify the results of its investigations.It is suggested that digital forensics should aim to catch up with other forensic disciplines by using Bayesian and other numerical methodologies to quantify its investigations’results.Assessing the plausibility of alternative hypotheses(or propositions,or claims)which explain how recovered digital evidence came to exist on a device could assist both the prosecution and the defence sides in criminal proceedings:helping the prosecution to decide whether to proceed to trial and helping defence lawyers to advise a defendant how to plead.This paper reviews some numerical approaches to the goal of quantifying the relative weights of individual items of digital evidence and the plausibility of hypotheses based on that evidence.The potential advantages enabling the construction of cost-effective digital forensic triage schemas are also outlined.
