HomeInformation To Digital Forensics
Information To Digital Forensics

Information To Digital Forensics

Computer forensics or digital forensics is a time period in computer science to obtain authorized evidence present in digital media or computers storage. With digital forensic investigation, the investigator can find what occurred to the digital media corresponding to emails, hard disk, logs, computer system, and the network itself. In lots of case, forensic investigation can produce how the crime may happened and how we are able to shield ourselves in opposition to it next time.

Some reasons why we have to conduct a forensic investigation: 1. To assemble evidences so that it may be used in court to solve legal cases. 2. To investigate our network power, and to fill the safety hole with patches and fixes. 3. To get better deleted information or any recordsdata in the event of hardware or software failure

In computer forensics, an important issues that should be remembered when conducting the investigation are:

1. The original proof must not be altered in in any case, and to do conduct the method, forensic investigator must make a bit-stream image. Bit-stream image is a little by little copy of the unique storage medium and precise copy of the original media. The distinction between a bit-stream image and normal copy of the original storage is bit-stream image is the slack area within the storage. You'll not discover any slack house information on a duplicate media.

2. All forensic processes should observe the authorized legal guidelines in corresponding nation where the crimes happened. Each country has completely different law suit in IT field. Some take IT guidelines very seriously, for instance: United Kingdom, Australia.

3. All forensic processes can solely be conducted after the investigator has the search warrant.

Forensic investigators would usually looking on the timeline of how the crimes occurred in timely manner. With that, we are able to produce the crime scene about how, when, what and why crimes could happened. In a giant company, it's suggested to create a Digital Forensic Crew or First Responder Team, so that the company may still preserve the proof until the forensic investigator come to the crime scene.

First Response guidelines are: 1. By no means should anyone, except for Forensic Analyst, to make any attempts to get better info from any computer system or machine that holds electronic information. 2. Any attempt to retrieve the info by particular person stated in number 1, should be prevented as it might compromise the integrity of the evidence, through which became inadmissible in authorized court.

Based on that rules, it has already explained the vital roles of getting a First Responder Crew in a company. The unqualified individual can solely safe the perimeter in order that nobody can contact the crime scene until Forensic Analyst has come (This may be accomplished by taking picture of the crime scene. They will additionally make notes about the scene and who were current at that time.

Steps must be taken when a digital crimes happenred in knowledgeable approach: 1. Safe the crime scene till the forensic analyst arrive.

2. Forensic Analyst must request for the search warrant from local authorities or firm's management.

3. Forensic Analyst make take a picture of the crime scene in case of if there is no any pictures has been taken.

4. If the computer continues to be powered on, do not turned off the computer. Instead, used a forensic tools akin to Helix to get some info that may solely be discovered when the computer is still powered on, comparable to data on RAM, and registries. Such instruments has it is special function as to not write anything back to the system so the integrity stay intake.

5. As soon as all live evidence is collected, Forensic Analyst cant turned off the computer and take harddisk back to forensic lab.

6. All of the evidences should be documented, in which chain of custody is used. Chain of Custody preserve data on the proof, comparable to: who has the evidence for the last time.

7. Securing the evidence must be accompanied by authorized officer resembling police as a formality.

8. Back within the lab, Forensic Analyst take the evidence to create bit-stream image, as unique evidence should not be used. Usually, Forensic Analyst will create 2-5 bit-stream image in case 1 image is corrupted. In fact Chain of Custody nonetheless used in this situation to maintain information of the evidence.

9. Hash of the unique proof and bit-stream image is created. This acts as a proof that original proof and the bit-stream image is the exact copy. So any alteration on the bit image will end in completely different hash, which makes the evidences discovered grow to be inadmissible in court.

10. Forensic Analyst begins to find proof in the bit-stream image by carefully trying at the corresponding location is determined by what sort of crime has happened. For instance: Short-term Internet Files, Ottawa Slack House, Deleted File, Steganography files.