Information To Digital Forensics

Information To Digital Forensics

Computer forensics or digital forensics is a term in computer science to obtain authorized evidence found in digital media or computers storage. With digital forensic investigation, toronto the investigator can discover 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 happened and the way we will defend ourselves towards it next time.

Some the reason why we have to conduct a forensic investigation: 1. To collect evidences so that it can be used in courtroom to unravel authorized cases. 2. To research our network power, and to fill the security gap with patches and fixes. 3. To recover deleted recordsdata or any recordsdata in the occasion of hardware or software failure

In computer forensics, an important things that have to be remembered when conducting the investigation are:

1. The unique proof should not be altered in anyhow, and to do conduct the process, forensic investigator should make a bit-stream image. Bit-stream image is a little by little copy of the unique storage medium and actual copy of the unique media. The difference between a bit-stream image and regular copy of the original storage is bit-stream image is the slack area in the storage. You will not find any slack house data on a replica media.

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

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

Forensic investigators would usually wanting 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 may happened. In an enormous firm, it is recommended to create a Digital Forensic Team or First Responder Staff, so that the company could still preserve the evidence until the forensic investigator come to the crime scene.

First Response guidelines are: 1. On no account ought to anyone, with the exception of Forensic Analyst, to make any attempts to get better information from any computer system or gadget that holds digital information. 2. Any attempt to retrieve the information by person said in number 1, needs to be averted as it could compromise the integrity of the proof, wherein turned inadmissible in legal court.

Primarily based on that rules, it has already explained the necessary roles of getting a First Responder Crew in a company. The unqualified individual can solely safe the perimeter in order that nobody can touch the crime scene till Forensic Analyst has come (This can be finished by taking photo of the crime scene. They'll additionally make notes about the scene and who had been current at that time.

Steps have to be taken when a digital crimes happenred in a professional manner: 1. Safe 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 a picture of the crime scene in case of if there isn't any any photos has been taken.

4. If the computer is still powered on, don't turned off the computer. Instead, used a forensic tools corresponding to Helix to get some information that may solely be discovered when the computer is still powered on, similar to knowledge 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 of the evidences have to be documented, during which chain of custody is used. Chain of Custody hold information on the evidence, such as: who has the proof for the final time.

7. Securing the evidence must be accompanied by legal officer reminiscent of police as a formality.

8. Back within the lab, Forensic Analyst take the proof to create bit-stream image, as unique evidence should not be used. Normally, Forensic Analyst will create 2-5 bit-stream image in case 1 image is corrupted. Of course Chain of Custody nonetheless used on this scenario to maintain records 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 discovered grow to be inadmissible in court.

10. Forensic Analyst starts to search out evidence within the bit-stream image by carefully trying on the corresponding location will depend on what sort of crime has happened. For instance: Short-term Internet Information, Slack Area, Deleted File, Steganography files.