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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 present in digital media or computers storage. With digital forensic investigation, the investigator can find what happened to the digital media akin to emails, hard disk, logs, computer system, and the network itself. In many case, forensic investigation can produce how the crime may occurred and how we are able to protect ourselves in opposition to it subsequent time.

Some reasons why we have to conduct a forensic investigation: 1. To collect evidences in order that it may be used in courtroom to unravel authorized cases. 2. To analyze our network energy, and to fill the safety gap with patches and fixes. 3. To get better deleted recordsdata or any information within the occasion of hardware or software program failure

In computer forensics, crucial issues that have to be remembered when conducting the investigation are:

1. The unique evidence should not be altered in in any case, and to do conduct the process, forensic investigator must make a bit-stream image. Bit-stream image is a little by little copy of the unique storage medium and exact copy of the unique media. The distinction between a bit-stream image and normal copy of the original storage is bit-stream image is the slack space within the storage. You will not find any slack area data on a duplicate media.

2. All forensic processes must follow the legal laws in corresponding nation where the crimes happened. Each country has completely different law suit in IT field. Some take IT rules very critically, for example: United Kingdom, Australia.

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

Forensic investigators would normally wanting at the timeline of how the crimes occurred in well timed manner. With that, we are able to produce the crime scene about how, when, what and why crimes may happened. In an enormous firm, it's advised to create a Digital Forensic Group or First Responder Team, in order that the corporate may still protect the evidence till the forensic investigator come to the crime scene.

First Response guidelines are: 1. On no account ought to anybody, aside from Forensic Analyst, to make any makes an attempt to recuperate info from any computer system or device that holds electronic information. 2. Any try to retrieve the data by particular person stated in number 1, should be prevented because it might compromise the integrity of the evidence, wherein became inadmissible in legal court.

Based mostly on that guidelines, it has already defined the important roles of having a First Responder Group in a company. The unqualified particular person can only safe the perimeter in order that no one can contact the crime scene till Forensic Analyst has come (This can be completed by taking picture of the crime scene. They can also make notes concerning the scene and who had been present at that time.

Steps should be taken when a digital crimes occurred in an expert manner: 1. Secure the crime scene till the forensic analyst arrive.

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

3. Forensic Analyst make take an image of the crime scene in case of if there is no such thing as a any photographs has been taken.

4. If the computer is still powered on, don't turned off the computer. As an alternative, used a forensic tools similar to Helix to get some information that may only be found when the computer is still powered on, equivalent to data on RAM, and registries. Such tools has it's particular perform as not to 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 the evidences should be documented, in which chain of custody is used. Chain of Custody maintain data on the proof, resembling: who has the evidence for the last time.

7. Securing the proof must be accompanied by authorized officer corresponding to police as a formality.

8. Back in the lab, Forensic Analyst take the proof 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 still used in this scenario to keep records of the evidence.

9. Hash of the original evidence and bit-stream image is created. This acts as a proof that authentic proof and the bit-stream image is the precise copy. So any alteration on the bit image will result in completely different hash, which makes the evidences discovered turn out to be inadmissible in court.

10. Forensic Analyst begins to find evidence within the bit-stream image by carefully wanting at the corresponding location is determined by what kind of crime has happened. For instance: Non permanent Internet Files, Slack House, Deleted File, Steganography files.