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The abundance of graphics applications has made it easy for anyone to modify digital pictures. However, modified pictures can cause problems for fields where altered photographs may give the wrong impression. Issues arise when altered images are used to convey misleading news, alter a product's performance in advertisements and scientific research, or are associated with identity theft or court proceedings. Forensic imaging provides algorithms, tools, and techniques for detecting image tampering. This chapter focuses on the problem space and some of the more common approaches to address problems in this field.

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This paper describes the design and implementation of a conversion tool. This tool, called Distributed Computing Environment (DCE) Porting Tool, converts an Open Network Computing (ON C) Remote Procedure Call (RPC) application to a DCE RPC application. The manual intervention needed during the conversion process in minimal. The paper briefly describes RPC programming and highlights the difference between ONC RPC and DCE RPC. The design decisions of the Porting Tool is explained. The implementation uses LEX and YACC (language processing tools supported by Unix) for conversion logic and OSF /MOTIF for Graphical User Interface (GUI). The paper concludes with current limitations of the Tool and the possible future work.