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 acquire legal evidence found in digital media or computers storage. With digital forensic investigation, the investigator can find what happened to the digital media corresponding to emails, hard disk, logs, computer system, and the network itself. In many case, forensic investigation can produce how the crime could happened and the way we can protect ourselves against it subsequent time.

Some the explanation why we need to conduct a forensic investigation: 1. To collect evidences in order that it may be utilized in courtroom to unravel legal cases. 2. To research our network strength, and to fill the security gap with patches and fixes. 3. To recuperate deleted files or any recordsdata in the event of hardware or software program failure

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

1. The original proof must not be altered in anyways, and to do conduct the method, forensic investigator must make a bit-stream image. Bit-stream image is a bit by bit copy of the unique storage medium and actual 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 house within the storage. You'll not discover any slack house data on a copy media.

2. All forensic processes should follow the legal laws in corresponding nation where the crimes happened. Every country has totally different law suit in IT field. Some take IT guidelines very severely, for instance: United Kingdom, Australia.

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

Forensic investigators would usually trying at the timeline of how the crimes happened in well timed manner. With that, we will produce the crime scene about how, litigation when, what and why crimes could happened. In a big company, it is prompt to create a Digital Forensic Workforce or First Responder Staff, so that the corporate may still preserve the evidence until the forensic investigator come to the crime scene.

First Response guidelines are: 1. In no way should anyone, except for Forensic Analyst, to make any attempts to recuperate info from any computer system or device that holds digital information. 2. Any try to retrieve the information by individual stated in number 1, should be prevented as it could compromise the integrity of the proof, in which turned inadmissible in legal court.

Based on that guidelines, it has already explained the important roles of getting a First Responder Workforce in a company. The unqualified particular person can only safe the perimeter so that no one can touch the crime scene till Forensic Analyst has come (This can be carried out by taking photo of the crime scene. They will additionally make notes in regards to the scene and who have been present at that time.

Steps have to be taken when a digital crimes happenred in knowledgeable means: 1. Secure the crime scene till the forensic analyst arrive.

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

3. Forensic Analyst make take an image of the crime scene in case of if there isn't a any images has been taken.

4. If the computer continues to be powered on, don't turned off the computer. As a substitute, used a forensic tools similar to Helix to get some info that can only be found when the computer is still powered on, akin to information on RAM, and registries. Such instruments has it's particular operate as not to write anything 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, by which chain of custody is used. Chain of Custody keep records on the proof, resembling: who has the evidence for the last time.

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

8. Back in 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 state of affairs to keep records of the evidence.

9. Hash of the original evidence 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 lead to different hash, which makes the evidences discovered grow to be inadmissible in court.

10. Forensic Analyst begins to search out evidence within the bit-stream image by fastidiously wanting at the corresponding location depends upon what kind of crime has happened. For instance: Non permanent Internet Files, Slack Area, Deleted File, Steganography files.