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Response to 3 separate discussion posts. 3 to 4 sentences each, sources as neede

by | Oct 10, 2021 | Computer Science | 0 comments


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Response to 3 separate discussion posts. 3 to 4 sentences each, sources as needed. 1. A restore point refers to the fixed state of a computer system and data. If a malfunction occurs, a system restore tool uses a restore point to return a computer to an earlier functional state. All necessary information to return the computer to the current state is included in a restore point. In most versions of Windows, this includes all important system files, the Windows Registry, program executables, supporting files, and much more. In Windows 10, Windows 8, Windows 7, and Windows Vista, a restore point is actually a volume shadow copy, a kind of snapshot of your entire drive, including all of your personal files. However, during a System Restore, only non-personal files are restored. These restore points have metadata (data about the data) associated with them. This information could be valuable in determining the point in time when a snapshot was taken. If the restore point contains evidence, this can tell us exactly when that data existed on the system in question. 2. Meta is has Greek origins and translates to “about the thing itself”. Therefore, metadata is essentially data about data; metadata contains information on other data to define and describe it. Metadata can be used in forensics to show when a file was created, accessed, modified and such. It also can contain information on the author, title, abstract, and keywords in a document. So, if a criminal were to have a file on their personal computer containing illegal content that they claimed to know nothing about, investigators can use metadata to see who created the file, when it was accessed, etc. They would then use that information to draw a conclusion that will either clear the suspect’s name or find them guilty of the crime in question. Metadata is not only attached to documents, it is also found in image files. When a picture is taken, the time, camera settings, GPS coordinates, make and model of the camera, and such are also recorded. This information can be the final piece of evidence needed to catch the perpetrator. There are two kinds of metadata, hidden and visible. Visible metadata is usually found in file properties. There are a variety of forensic tools that can retrieve hidden metadata, and criminal investigators are the main people that use them. Many of them are also open source and free to the public such as ExifTool, so the average person can mess around with them if they want to. 3. When a file is deleted, assuming the recycling bin is turned off for obvious reasons, Windows simply removes the file from the index which makes the file inaccessible. The file is technically still there and can be recovered easily. Since the file is no longer on the index, Windows views this as unclaimed space and will use that file’s storage location as free space for anything. A few things can impact the recovery process, if the file is on a HDD defragging has a very high chance of destroying the file, temporary files being created and removed by standard Windows features, creating any new file by the user also has the chance of destroying the file. There is also one thing that not a lot of people understand about file recovery, when doing recovery on a drive most recovery tools will save a sort of “snap shot” of the drive’s state to be able to load it quickly again in the event that it is a large drive. A 4TB 7200RPM drive can take upwards of 8 hours to get a detailed scan. That being said, when doing any kind of recovery it is very important to recover the files onto any other storage device other than the source, as it could completely alter the state of the drive making the scan information completely useless, requiring another scan as well as deleting valuable evidence.


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