Digital Forensics: First Responder and Digital Evidence Applied Scenarios

Scenario-driven FACT entrance drill on first-responder decisions and digital evidence handling. Every question is set in a working investigation: encrypted volumes that have to be imaged before the keys leave RAM, NVMe drives that the spare SATA write blocker cannot touch, E01 versus AFF4 versus raw dd format choices that turn on case-data and compression needs, chain-of-custody gaps that the prosecution has to repair with contemporaneous records, and Section 65B IEA / Section 63 BSA certificates signed by the wrong person. The questions test which procedure or provision actually applies to the facts, not what the textbook definition is in isolation.

Built for FACT aspirants and NFSU MSc digital forensics entrance candidates who have finished the easy-band material and now want medium-band scenarios. CHFI, GCFA, and BPRD digital-evidence trainees will find the same cases. Coverage cross-cites the new Indian criminal codes (BNSS 2023, BSA 2023) against their CrPC 1973 and Indian Evidence Act 1872 ancestors, with the Supreme Court rulings in Anvar P.V. v. P.K. Basheer (2014) and Arjun Panditrao Khotkar v. Kailash Kushanrao Gorantyal (2020) running through the certificate questions.

Topics covered:

• Live vs dead acquisition under encrypted-volume facts
• Order of volatility on hybrid disk, RAM, and remote-log scenes
• Write blocker selection: SATA vs NVMe vs software USB hooks
• Imaging formats: raw dd, E01, AFF4 chosen by case requirements
• Hash collision handling and SHA-1/MD5 deprecation timing
• Chain of custody breach scenarios and their statutory remedies
• BNSS 2023 search and seizure, audio-video recording under Section 105
• FileVault, BitLocker, LUKS key handling and recovery-key custody
• NTFS vs FAT32 quick-format recovery, MFT-wipe carving constraints
• Timestomp detection via $STANDARD_INFORMATION vs $FILE_NAME attributes
• Mobile seizure: BFU, Faraday bag failure, airplane mode trade-offs
• Panch witness role in panchnama under BNSS Section 103

Aim for 50 to 60 percent accuracy: medium-band distractors share most attributes with the right answer and a single misread will pull you onto the wrong one. Allow 30 minutes.