Forensic duplication is the entire and unaltered copying of the contents of a storage device. Bitwise duplication, sector copying, and physical imaging are all terms used to describe the process.
Forensics in the Digital Age:
A forensic clone is a copy of digital evidence that is identical to the original bit-for-bit. You can clone files, directories, hard discs, and more. A bit-stream image or forensic image is another name for a forensic clone.
To copy bits from one file to another, use the dd command. All forensic duplicating tools are based on this method of copying bits. dd has a lot of features, and the source code is open to the public.
In general, forensic duplication is required if the incident is serious or if erased data needs to be recovered.
A forensic image is a copy of a storage device's every sector and byte, including seemingly empty storage that could contain deleted items. The data on the phone can be viewed without affecting the original data if you have a forensic image.