Data diddling is the act of extracting and changing value of a data without the knowledge of owner is a crime. A data diddling (also called false data entry) simply means altering of data before entering it or during entering to the computer system. Data diddling can also occur when data is altered just before it is processed by computer system and this same data can be modify back after processing the fake data that was entered. This form of cyber crime usually occur within organization providing customer services i.e. electricity organization, medical organization, transport organization, etc. where customer bill, personal information or order valuable and important records are manipulated.
Data diddling actions are also classified to be forging or counterfeiting of documents. Computer Forensic Experts are good on investigation data diddling case by recovering or tracing original/raw data/document from a computer system.