Information To Digital Forensics

Information To Digital Forensics

Computer forensics or digital forensics is a time period in computer science to acquire legal proof found in digital media or computers storage. With digital forensic investigation, the investigator can find what happened to the digital media equivalent to emails, hard disk, logs, computer system, and the network itself. In many case, forensic investigation can produce how the crime may happened and how we are able to shield ourselves in opposition to it next time.

Some reasons why we have to conduct a forensic investigation: 1. To gather evidences in order that it can be utilized in court to solve authorized cases. 2. To analyze our network strength, and to fill the safety hole with patches and fixes. 3. To get better deleted recordsdata or any recordsdata in the occasion of hardware or software failure

In computer forensics, a very powerful things that must be remembered when conducting the investigation are:

1. The original evidence must not be altered in anyways, 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 original storage medium and precise copy of the unique media. The difference between a bit-stream image and normal copy of the original storage is bit-stream image is the slack house within the storage. You will not discover any slack space data on a replica media.

2. All forensic processes must observe the authorized legal guidelines in corresponding country the place the crimes happened. Every nation has different legislation suit in IT field. Some take IT guidelines very severely, for instance: United Kingdom, Australia.

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

Forensic investigators would normally trying on the timeline of how the crimes occurred in timely manner. With that, we are able to produce the crime scene about how, when, what and why crimes might happened. In a giant company, it is instructed to create a Digital Forensic Staff or First Responder Team, so that the company could nonetheless preserve the evidence until the forensic investigator come to the crime scene.

First Response rules are: 1. Not at all should anyone, except Forensic Analyst, to make any attempts to get better info from any computer system or gadget that holds digital information. 2. Any try to retrieve the info by individual stated in number 1, must be prevented because it may compromise the integrity of the proof, in which became inadmissible in authorized court.

Based mostly on that rules, it has already defined the necessary roles of getting a First Responder Workforce in a company. The unqualified individual can solely secure the perimeter in order that nobody can contact the crime scene till Forensic Analyst has come (This may be completed by taking photo of the crime scene. They'll also make notes about the scene and who have been current at that time.

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

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

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

4. If the computer is still powered on, don't turned off the computer. As a substitute, used a forensic tools akin to Helix to get some information that may solely be found when the computer is still powered on, such as knowledge on RAM, and registries. Such instruments has it is special perform as to not write something back to the system so the integrity keep intake.

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

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

7. Securing the proof should be accompanied by legal officer equivalent to police as a formality.

8. Back in the lab, Forensic Analyst take the proof to create bit-stream image, as original evidence should not be used. Normally, Forensic Analyst will create 2-5 bit-stream image in case 1 image is corrupted. In fact Chain of Custody nonetheless used in this situation to keep information 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 found change into inadmissible in court.

10. Forensic Analyst starts to seek out evidence in the bit-stream image by fastidiously looking on the corresponding location is determined by what kind of crime has happened. For example: Momentary Internet Recordsdata, Slack Space, toronto Deleted File, Steganography files.