Information To Digital Forensics

Information To Digital Forensics

Computer forensics or digital forensics is a term in computer science to obtain authorized proof present in digital media or computers storage. With digital forensic investigation, the investigator can find what happened to the digital media resembling emails, hard disk, logs, computer system, and the network itself. In lots of case, forensic investigation can produce how the crime may happened and the way we will protect ourselves towards it next time.

Some the explanation why we need to conduct a forensic investigation: 1. To assemble evidences in order that it can be used in court to solve authorized cases. 2. To investigate our network power, and to fill the safety hole with patches and fixes. 3. To recover deleted recordsdata or any recordsdata within the occasion of hardware or software failure

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

1. The original evidence must not be altered in in any case, 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 unique storage medium and precise copy of the original media. The distinction between a bit-stream image and regular copy of the unique storage is bit-stream image is the slack house in the storage. You'll not find any slack space information on a duplicate media.

2. All forensic processes should observe the authorized laws in corresponding country the place the crimes happened. Each country has different law suit in IT field. Some take IT rules very seriously, 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 timely manner. With that, we can produce the crime scene about how, when, what and why crimes may happened. In an enormous firm, it's instructed to create a Digital Forensic Group or First Responder Group, in order that the corporate could still protect the proof until the forensic investigator come to the crime scene.

First Response rules are: 1. Certainly not should anyone, except Forensic Analyst, to make any makes an attempt to recover information from any computer system or gadget that holds digital information. 2. Any attempt to retrieve the data by particular person mentioned in number 1, should be averted because it may compromise the integrity of the evidence, by which turned inadmissible in authorized court.

Based on that rules, it has already explained the important roles of having a First Responder Staff in a company. The unqualified particular person can solely secure the perimeter in order that nobody can contact the crime scene till Forensic Analyst has come (This may be performed by taking picture of the crime scene. They can also make notes about the scene and who have been current at that time.

Steps have to be taken when a digital crimes happenred in an expert method: 1. Safe 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 a picture 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, do not turned off the computer. Instead, used a forensic instruments similar to Helix to get some info that may solely be found when the computer remains to be powered on, akin to knowledge on RAM, and registries. Such instruments has it is special function as not to write anything back to the system so the integrity keep intake.

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

6. All the evidences have to be documented, by which chain of custody is used. Chain of Custody preserve data on the proof, such as: who has the proof for the last time.

7. Securing the evidence must be accompanied by authorized officer similar to police as a formality.

8. Back within the lab, Forensic Analyst take the proof to create bit-stream image, as original evidence should not be used. Usually, Forensic Analyst will create 2-5 bit-stream image in case 1 image is corrupted. Of course Chain of Custody still used on this situation to maintain records of the evidence.

9. Hash of the original evidence and bit-stream image is created. This acts as a proof that authentic 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 become inadmissible in court.

10. Forensic Analyst starts to search out proof within the bit-stream image by fastidiously trying on the corresponding location will depend on what sort of crime has happened. For example: Temporary Internet Recordsdata, Slack House, Deleted File, Steganography files.