This is a potential security issue, you are being redirected to https://csrc.nist.gov
In its strictest connotation, the application of computer science and investigative procedures involving the examination of digital evidence - following proper search authority, chain of custody, validation with mathematics, use of validated tools, repeatability, reporting, and possibly expert testimony.
CNSSI 4009-2015 DoDD 5505.13E
See digital forensics.
CNSSI 4009-2015 under computer forensics
The application of science to the identification, collection, examination, and analysis, of data while preserving the integrity of the information and maintaining a strict chain of custody for the data.
NIST SP 800-86 under Digital Forensics