The key difference between digital and other types of forensics is that digital forensics techniques are used to examine and analyse digital data, that is, data stored in some form on an electronic device, whereas other forensic investigations handle physical evidence. Essentially, digital forensics is a branch of forensic science. The techniques used to preserve, retrieve, and examine such evidence are unique to digital forensics. Such as imaging techniques that are used to clone questioned devices, that preserve the evidence. Digital forensics involves a vast array of techniques depending on the type of digital data that is under analysis such as network forensics, malware forensics, memory forensics, video forensics, audio forensics, computer forensics, mobile forensics, multimedia forensics, email forensics etc.