Abstract
In this article, we describe the performance evaluation of INACT tool which is developed for cataloguing of high-level and low-level metadata of the evidence material. INACT tool can be used by police forces in the cases of prosecution of such crimes as as possession and distribution of child pornography (CP). In live forensic cases, the time to first hit (time when the first image containing e.g. CP is found) is important, as then further legal actions are justified (such as arrest of the suspect and his hardware). The performance evaluation of first hit was performed on real data with the cooperation of Czech Police, Department of Internet Crime.
Highlights
Child pornography (CP) is a term that broadly describes all multimedia and writings that depict sexual activities involving a child
The police have at their disposal sets of images containing child pornography from various sources, including ongoing investigations and international channels of cooperation
Since the application is primarily being developed for police forces, there is a need to perform a set of experiments which are based on real data
Summary
Child pornography (CP) is a term that broadly describes all multimedia and writings that depict sexual activities involving a child. As at 2008, 94 of 187 Interpol member states refer to CP as a crime in their code of laws. Possession of such content is punishable in 58 countries [1]. Since this crime is regarded as being extremely harmful, its prosecution is of the highest priority for police forces and law enforcement organizations around the world. Possession of CP images is considered a crime in most countries. This law applies to regular citizens, and to police units. Local regulations force police officers to destroy all evidence after the
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