Information To Digital Forensics

Information To Digital Forensics

Computer forensics or digital forensics is a term in computer science to acquire authorized proof 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 how we are able to defend ourselves against it next time.

Some reasons why we have to conduct a forensic investigation: 1. To assemble evidences so that it may be used in courtroom to solve legal cases. 2. To research our network energy, and to fill the security hole with patches and fixes. 3. To get well deleted recordsdata or any files in the occasion of hardware or software program failure

In computer forensics, a very powerful issues that need to be remembered when conducting the investigation are:

1. The original evidence should not be altered in anyhow, and to do conduct the method, forensic investigator should make a bit-stream image. Bit-stream image is a bit by bit copy of the original storage medium and precise copy of the original media. The distinction between a bit-stream image and normal copy of the unique storage is bit-stream image is the slack space within the storage. You will not find any slack house data on a replica media.

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

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

Forensic investigators would normally trying at the timeline of how the crimes happened in well timed manner. With that, we can produce the crime scene about how, when, what and why crimes could happened. In a giant company, it's urged to create a Digital Forensic Staff or First Responder Staff, in order that the corporate may still protect the evidence till the forensic investigator come to the crime scene.

First Response rules are: 1. By no means should anybody, aside from Forensic Analyst, to make any makes an attempt to recuperate info from any computer system or machine that holds electronic information. 2. Any try and retrieve the information by individual mentioned in number 1, needs to be avoided because it could compromise the integrity of the evidence, wherein turned inadmissible in authorized court.

Primarily based on that guidelines, it has already defined the important roles of getting a First Responder Team in a company. The unqualified individual can only safe the perimeter in order that no one can contact the crime scene until Forensic Analyst has come (This can be accomplished by taking photo of the crime scene. They'll also make notes in regards to the scene and who were present at that time.

Steps have to be taken when a digital crimes occurred in knowledgeable approach: 1. Secure the crime scene until 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 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, don't turned off the computer. Instead, used a forensic instruments comparable to Helix to get some info that can only be discovered when the computer is still powered on, resembling information on RAM, and registries. Such instruments has it is particular perform as not to write anything back to the system so the integrity stay intake.

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

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

7. Securing the evidence have to be accompanied by authorized officer equivalent 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. Normally, Forensic Analyst will create 2-5 bit-stream image in case 1 image is corrupted. After all Chain of Custody nonetheless used on 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 unique evidence and the bit-stream image is the precise copy. So any alteration on the bit image will end in different hash, which makes the evidences discovered turn out to be inadmissible in court.

10. Forensic Analyst begins to seek out proof in the bit-stream image by fastidiously looking on the corresponding location relies on what kind of crime has happened. For example: Non permanent Internet Files, Slack House, Deleted File, Steganography files.