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Essay on Computer forensics
Computer forensics, still a rather new discipline in computer security, focuses on finding digital evidence after a computer security incident has occurred.(Web,1)
Computer forensics is the process of investigating data storage devices and/or data processing equipment typically a home computer, laptop, server, office workstation, or removable media such as compact discs, to determine if the equipment has been used for illegal, unauthorized, or unusual activities. It can also include monitoring a network for the same purpose. Computer forensics experts must:
1. Identify sources of documentary or other digital evidence
2. Preserve the evidence
3. Analyze the evidence
4. Present the findings
They must do so in a fashion that adheres to the standards of evidence that is admissible in a court of law.
The impartial computer expert who helps during discovery will typically have experience on a wide range of computer hardware and software. This is always beneficial when your case involves hardware and software with which this expert is directly familiar. But fundamental computer design and software implementation is often quite similar from one system to another, and experience in one application or operating system area is often easily transferable to a new system.
Unlike paper evidence, computer evidence can often exist in many forms, with earlier versions still accessible on a computer disk. Knowing the possibility of their existence, even alternate formats of the same data can be discovered.(Platt, 2004)
The discovery process can be served well by a knowledgeable expert identifying more possibilities that can be requested as possibly relevant evidence. In addition, during on-site premises inspections, for cases where computer disks are not actually seized or forensically copied.
The forensics expert can more quickly identify places to look, signs to look for, and additional information sources for relevant evidence. These may take the form of earlier versions of data files (eg. memos, spreadsheets) that still exist on the computer's disk or on backup media, or differently formatted versions of data, either created or treated by other application programs....
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