Preserving the integrity of original evidence is the foundational principle of digital forensics. Investigators must ensure that original data is never modified during collection, analysis, or storage—typically achieved through techniques such as using write-blockers, creating forensic images (bit-for-bit copies), and calculating cryptographic hashes to verify data integrity. This preservation of the original evidence is essential to maintain a valid chain of custody and ensure the evidence remains admissible and trustworthy in any subsequent legal or disciplinary proceedings. Modifying original data—even inadvertently—can compromise the investigation and render evidence inadmissible.
Community Discussion