Forensic integrity verification of video recordings based on MTS files

Digital video is used in criminal trials as evidence with legal responsibility because video content vividly depicts events occurring at a crime scene. However, using sophisticated video editing software, assailants can easily manipulate visible clues for their own benefit. Therefore, the integrity of digital video files acquired or submitted as evidence must be ensured. Forensic analysis of digital video is key to ensuring the integrity of links with individual cameras. In this study, we analyzed whether it is possible to ensure the integrity of MTS video files. Herein, we propose a method to verify the integrity of MTS files encoded by advanced video coding high definition (AVCHD), which is frequently used for video recording. To verify MTS file integrity, we propose five features. Codec information, picture timing, and camera manufacture/model are modified AVI and MP4-like format video verification features. Group of pictures and Universally Unique Identifier patterns were specifically developed for MTS streams. We analyzed the features of 44 standard files recorded using all recording options of seven cameras. We checked whether integrity can be validated on unmanipulated videos recorded in various environments. In addition, we considered whether manipulated MTS files edited in video editing software could be validated. Experimental results show that all unmanipulated and manipulated MTS files with known recording devices were discriminated only when all five features were checked. These results show that the proposed method verifies the integrity of MTS files, strengthening the validity of MTS file-based evidence in trials.     

Study on the standard components of digital forensics laboratory

Recently, digital forensics has become increasingly important as it is used by investigation agencies, corporate, and private sector. To supplement the limitations of evidence capacity and be recognized in court, it is essential to establish an environment that ensures the integrity of the entire process ranging from collecting and analyzing to submitting digital evidence to court. In this study, common elements were extracted by comparing and analyzing ISO/IEC 17025, 27001 standards and Interpol and Council of Europe (CoE) guidelines to derive the necessary components for building a digital forensic laboratory. Subsequently, based on 21 digital forensic experts in the field, Delphi survey and verifications were conducted in three rounds. As a result, 40 components from seven areas were derived. The research results are based on the establishment, operation, management, and authentication of a digital forensics laboratory suitable for the domestic environment, with added credibility through collection of the opinions of 21 experts in the field of digital forensics in Korea. This study can be referred to in establishing digital forensic laboratories in national, public, and private digital forensic organizations as well as for employing as competency measurement criteria in courts to evaluate the reliability of the analysis results.     

Scopic valuations: how digital tracking technologies shape economic value

How do market actors in the contemporary economy make decisions when they are uncertain of the value of what is being traded? To answer this question, this paper analyses the changing temporal and spatial orientation of economic valuations in increasingly digitalized economies, in which markets can no longer be understood as locally bound and closed sites of valuation and exchange. Drawing on ethnographic material from the fishing industry, the paper shows how digital tracking technologies link and synchronize auction markets with real-time information on fishing activities. Hence, ‘scopic media’ such as chart plotters and computer screens are not only deployed by skippers to monitor one another, but are also used as valuation devices that recontextualize local knowledge for the purpose of coping with economic uncertainty. As a consequence of this panoptic valuation regime, fishermen control their virtual identities by disciplining harvesting practices according to their buyers’ expectations.     

“互联网+”时代下的图书馆发展研究

“互联网+”时代的来临对社会的各个方面都产生了巨大影响,对图书馆的发展也带来了影响与挑战。“互联网+”时代的图书馆将如何发展,如何合理规划建设图书馆的各类资源,怎样用“互联网+”思维发展图书馆,已成为“互联网+”时代亟待研究的热题。     

从数字资源开发看公安特色数据库的建设与发展

公安文献信息数字资源主要来自公安机关、院校、协会等建立的特色数据库;建设特色数据库应全面掌握公安业务信息,深入了解公安学科专业设置状况,在与其它公安院校合作的基础上,建立起具有鲜明学科、专业特色的数据库体系,以便更好地为用户提供高质量的专业化服务。     

An Evidence‐based Forensic Taxonomy of Windows Phone Dating Apps

Advances in technologies including development of smartphone features have contributed to the growth of mobile applications, including dating apps. However, online dating services can be misused. To support law enforcement investigations, a forensic taxonomy that provides a systematic classification of forensic artifacts from Windows Phone 8 (WP8) dating apps is presented in this study. The taxonomy has three categories, namely: Apps Categories, Artifacts Categories, and Data Partition Categories. This taxonomy is built based on the findings from a case study of 28 mobile dating apps, using mobile forensic tools. The dating app taxonomy can be used to inform future studies of dating and related apps, such as those from Android and iOS platforms.     

Digital Infrastructure for Diversity—On Digital Bookshelf and Google Books

Diversity is a core value of cultural policy, and new global digital conditions for creative industries mean new challenges for diversity at a national level. Internet has become a new infrastructure for services and platforms, and global actors as Google and Amazon are changing the play. This article concerns digitization of books, the collection of the National Library of Norway and cultural policy. The results indicate the National Library's digital collection contributes to diversity in terms of demography, content, dissemination and techno-cultural aspects. For policy makers, libraries and researchers the study demonstrates a national digital service's contribution to expanded diversity.     

基于水印技术的司法数码影像防伪信息系统

数码影像作为证据使用存在一定的争议,针对此提出并建立了基于水印技术的司法数码影像防伪信息系统,该系统由加密防伪子系统、信息管理子系统和加密信息验证子系统组成,为确保司法数码影像的证据效力提供了一种技术方案。