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Information To Digital Forensics

Information To Digital Forensics

Computer forensics or digital forensics is a time period in computer science to acquire legal evidence found in digital media or computers storage. With digital forensic investigation, the investigator can find what happened to the digital media comparable to emails, hard disk, cybercrime logs, computer system, and the network itself. In many case, forensic investigation can produce how the crime could happened and how we can protect ourselves towards it subsequent time.

Some reasons why we have to conduct a forensic investigation: 1. To collect evidences so that it can be used in court to resolve authorized cases. 2. To investigate our network power, and to fill the security gap with patches and fixes. 3. To get well deleted files or any recordsdata in the event of hardware or software failure

In computer forensics, crucial things that should be remembered when conducting the investigation are:

1. The unique proof should not be altered in in any case, and to do conduct the method, forensic investigator should make a bit-stream image. Bit-stream image is a little by little copy of the original storage medium and actual copy of the original media. The difference between a bit-stream image and normal copy of the original storage is bit-stream image is the slack area in the storage. You will not discover any slack area information on a copy media.

2. All forensic processes should follow the authorized laws in corresponding nation the place the crimes happened. Each country has totally different legislation suit in IT field. Some take IT guidelines very critically, for example: United Kingdom, Australia.

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

Forensic investigators would normally looking on the timeline of how the crimes occurred in well timed manner. With that, we can produce the crime scene about how, when, what and why crimes might happened. In a giant company, it is recommended to create a Digital Forensic Team or First Responder Team, so that the corporate might nonetheless preserve the proof till the forensic investigator come to the crime scene.

First Response guidelines are: 1. In no way ought to anyone, apart from Forensic Analyst, to make any makes an attempt to get well information from any computer system or device that holds electronic information. 2. Any try to retrieve the info by particular person said in number 1, should be averted as it could compromise the integrity of the evidence, during which turned inadmissible in authorized court.

Primarily based on that guidelines, it has already explained the necessary roles of getting a First Responder Workforce in a company. The unqualified particular person can solely secure the perimeter so that nobody can touch the crime scene until Forensic Analyst has come (This may be carried out by taking photograph of the crime scene. They'll also make notes concerning the scene and who were present at that time.

Steps should be taken when a digital crimes occurred in knowledgeable method: 1. Secure the crime scene until the forensic analyst arrive.

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

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

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

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

6. All of the evidences must be documented, during which chain of custody is used. Chain of Custody preserve information on the evidence, similar to: who has the evidence for the final time.

7. Securing the evidence have to be accompanied by authorized officer similar to police as a formality.

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

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

10. Forensic Analyst begins to search out proof within the bit-stream image by rigorously trying at the corresponding location is dependent upon what sort of crime has happened. For example: Temporary Internet Recordsdata, Slack Space, Deleted File, Steganography files.

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