Technical field guide
The sections below preserve the service-specific depth behind Computer & Digital Forensics, edited for the current national practice and its documented engagement model. Methods are selected for the source, authorization, system state and assigned specialty. No single tool or artifact establishes a conclusion, and legal, regulatory or certification decisions remain with the responsible authority.
Computer forensics starts with the source
Computer forensics is the documented preservation and analysis of digital records from computers, storage media, accounts and connected systems. The practical question is rarely whether a file exists. It is usually who used it, how it arrived, whether it changed, where it moved and what independent artifacts support that sequence.
GDF scopes the work around the event or allegation first. That keeps the examination tied to the relevant custodians, devices, accounts, dates and data types. It also makes exclusions visible. A focused examination can be more useful than an indiscriminate search when the record must be explained to counsel, an insurer, a regulator or a trier of fact.
Computers, drives, applications and connected records
A computer can hold file-system journals, operating-system logs, application databases, browser records, cloud synchronization history, USB connection records, recent-item artifacts, email stores, print traces and remnants of deleted content. Servers and enterprise systems add identity, network, virtualization, backup and administrative records. Mobile and cloud sources may provide independent timestamps or account activity that confirms or challenges what appears on the computer.
- Windows, macOS and supported server systems
- Hard drives, SSDs, removable media and forensic images
- Email, cloud storage and collaboration records
- Application data, databases, logs and backups
- Network, identity and remote-access records
Deleted data and user activity
Deletion is an event, not a guarantee that content is recoverable. The result depends on storage technology, encryption, reuse, synchronization, retention and the time since deletion. Even when file contents are gone, directory entries, journals, link files, thumbnails, application databases or backups may retain useful context.
User-attribution questions require the same discipline. A username, login or USB connection does not by itself prove who performed a specific act. Examiners correlate authentication, device state, application activity, communications, physical access and competing explanations. The report separates what the artifacts show from what must be inferred.
Preservation, validation and reporting
The acquisition plan accounts for source condition, volatility, encryption, legal scope and business continuity. Depending on the system and question, work may use a physical image, logical acquisition, targeted collection, live response or an approved combination. The record identifies method, tools and versions, dates, integrity values, source changes and collection exceptions.
Deliverables can include an acquisition record, artifact schedule, normalized timeline, native or rendered exhibits, technical report and expert workpapers. When testimony is in scope, the examiner explains the methods, findings, alternatives and limits without turning a technical opinion into a legal conclusion.