DIGITAL FORENSICS & INCIDENT RESPONSE  (DFIR) is a Part of Cyber Security which deals with the identification, preservation, analysis, and remediation of cyberattacks. suppose a company is under some cyber attacks and hackers are trying to delete or stole the data in that case digital forensics expert will recover the data like files, emails, photos and all other important data using digital footprints, we use different type of software and tools to investigate encrypted data.