Licensed Helps In Digital Forensic Works - Myassignmenthelp.Com

Question: Discuss About The Licensed Helps In Digital Forensic Works? Answer: Introducation The assignment serves the purpose of providing an overview on some of the software and hardware that can be used to collect the disk image of a Linux based computer from the crime scene that cannot be removed from the scene. Many tools can be found in the market, both open sourced and licensed that helps in digital forensic works. The main method is to use Linux Live CD that has an operating system of its own and can be used to gather disk image from the computer at a crime scene, which cannot be removed from the scene (Nelson, Phillips Steuart, 2014). However, Linux Operating System is often equipped with in built tools that help in the digital forensic jobs as well. The hardware requirement for collecting disk image is an external hard drive or an external storage device that has the required storage space to load the disk image that has been retrieved from the computer (Quick Choo, 2016). The software requirement is met by using a digital forensic tool, some basic knowledge on the modification of the BIOS setup of the computer if necessary and knowhow of using shell commands within the computer. In this case, the Linux dd is considered as a tool to retrieve the disk image from the Linux computer (Rafique Khan, 2013). Linux dd This tool is preloaded in most latest Linux operating systems like Ubuntu and Fedora. The tool serves the purpose of creating a drive image from the Linux based computer or forensically wiping a drive. To operate a dd, a command prompt window is required to be opened where the term dd is entered along with a set of command parameters depending on the task that is required to be performed. In this case, the dd will be used to collect the drive image from the Linux based computer (Sindhu Meshram, 2012). The common dd syntax for the creation of a forensic image of a drive is as given below: where if = input file or drive, of = output file, bs = byte size, conv = conversion options (Sindhu Meshram, 2012).The obtained data or image of the disk is stored in an external hard drive for using as evidence during the investigation (Sindhu Meshram, 2012).The purpose of the research is to provide solution regarding the hiding procedure of secret messages to a graphic file such as an video or image file for an investigation where a number of graphic files have been sent from an unknown source to a suspect of the crime through email. Many methods are there that help in embedding sensitive data in graphic files. The prime purpose of such a method is to send secret information to a target recipient without involving the risk of compromising the data at the hands of an intermediate receiver who might intercept the data while it is being electronically transferred (Green et al., 2015). Using the method of Steganography using a tool in Kali Linux known as steghide is considered as a solution to embed such kind of secret data into a graphic file like an image or video file (Hamid et al., 2012). Steghide A software can be used to hide messages inside graphical files such as digital images and videos. This software can be used only if it is installed in a computer that has Kali Linux as its operating system (Chanu, Singh Tuithung, 2012). The process involves installing the software in Kali Linux as the initial step. A text file is created that contains the hidden message required to be sent to the target individual. A text editor can be used for this phase of the process. It is mandatory to save the file before proceeding with the next phases of the business process. The image file that will be used to disguise the secret message is also saved along with the text file (Das, 2014). The next step involves the embedding of the hidden message with the graphic file using steghide. The embedding requires entering some command parameters in the terminal window along with a password or a passphrase. The process of embedding is thus complete (Das, 2014). The tool can also be used to compare the original file to the stenographic file, which shows that the stenographic file is considerably larger than the original file. The hash values of the original file differ from the modified stenographic file as well. The embedded message can be retrieved by using the extract sf command in the terminal window (Das, 2014). References Chanu, Y. J., Singh, K. M., Tuithung, T. (2012). Image steganography and steganalysis: A survey. International Journal of Computer Applications, 52(2). Das, R. (2014). An Investigation on Information Hiding Tools for Steganography. International Journal of Information Security Science, 3(3), 200-208. Green, J., Levstein, I., Boggs, C. R. J., Fenger, T. (2015). Steganography Analysis: Efficacy and Response-Time of Current Steganalysis Software. J Comput Sci, 9, 236-44. Hamid, N., Yahya, A., Ahmad, R. B., Al-Qershi, O. M. (2012). Image steganography techniques: an overview. International Journal of Computer Science and Security (IJCSS), 6(3), 168-187. Nelson, B., Phillips, A., Steuart, C. (2014). Guide to computer forensics and investigations. Cengage Learning. Quick, D., Choo, K. K. R. (2016). Big account data reduction: digital forensic images and electronic evidence. Cluster Computing,Management, 19(2), 723-740. Rafique, M., Khan, M. N. A. (2013). Exploring static and live digital forensics: Methods, practices and tools. International Journal of Scientific Engineering Research, 4(10), 1048-1056. Sindhu, K. K., Meshram, B. B. (2012). Digital forensics and cyber crime datamining. Journal of Information Security, 3(3), 196.