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Data remanence is the residual representation of digital data that remains even after attempts have been made to remove or erase the data. This residue may result from data being left intact by a nominal file deletion operation, by reformatting of storage media that does not remove data previously written to the media, or through physical properties of the storage media that allow previously ...
Many government and industry standards exist for software-based overwriting that removes the data. A key factor in meeting these standards is the number of times the data is overwritten. Also, some standards require a method to verify that all the data have been removed from the entire hard drive and to view the overwrite pattern.
In software engineering and computer science, clobbering a file, processor register or a region of computer memory is the process of overwriting its contents completely, whether intentionally or unintentionally, or to indicate that such an action will likely occur. [1] The Jargon File defines clobbering as
The entry of the deleted file must still exist in the directory, meaning that it must not yet be overwritten by a new file (or folder) that has been created in the same directory. Whether this is the case can fairly easily be detected by checking whether the remaining name of the file to be undeleted is still present in the directory.
To permanently delete a file, you must repeatedly overwrite the existing file with new data. Microsoft Windows does not securely delete files because every file operation would be very slow. Shredding a document does not always prevent that document from being recovered because some programs make temporary hidden copies of open documents.
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Existing target files: action to take in relation to existing files in target location (if a file already exists, does not exist, or other files exist) A subtlety in handling existing files is whether such files are overwritten on attempting to copy, or they are renamed (or the target temporarily named) and only removed once the replacement ...
Steganography is a technique where information or files are hidden within another file in an attempt to hide data by leaving it in plain sight. "Steganography produces dark data that is typically buried within light data (e.g., a non-perceptible digital watermark buried within a digital photograph)."