Information To Digital Forensics
Information To Digital Forensics

Information To Digital Forensics

Computer forensics or digital forensics is a term in computer science to acquire legal evidence found in digital media or computers storage. With digital forensic investigation, the investigator can discover what occurred 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 might occurred and how we will protect ourselves towards it subsequent time.

Some reasons why we have to conduct a forensic investigation: 1. To collect evidences in order that it can be utilized in court to solve legal cases. 2. To investigate our network power, and to fill the security gap with patches and fixes. 3. To recover deleted information or any recordsdata within the event of hardware or software failure

In computer tcs tcs forensics, the most important things that need to be remembered when conducting the investigation are:

1. The unique proof must not be altered in anyways, 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 original storage medium and precise copy of the unique media. The difference between a bit-stream image and normal copy of the unique storage is bit-stream image is the slack house in the storage. You'll not discover any slack area info on a copy media.

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

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

Forensic investigators would normally wanting at the timeline of how the crimes happened in timely manner. With that, we are able to produce the crime scene about how, when, what and why crimes may happened. In an enormous company, it is suggested to create a Digital Forensic Group or First Responder Group, in order that the corporate may still preserve the proof until the forensic investigator come to the crime scene.

First Response rules are: 1. By no means should anybody, excluding Forensic Analyst, to make any attempts to get better info from any computer system or device that holds digital information. 2. Any try to retrieve the information by particular person stated in number 1, should be avoided because it might compromise the integrity of the evidence, by which grew to become inadmissible in legal court.

Based on that rules, it has already explained the necessary roles of getting a First Responder Group in a company. The unqualified particular person can solely safe the perimeter so that nobody can contact the crime scene until Forensic Analyst has come (This can be performed by taking photograph of the crime scene. They can additionally make notes in regards to the scene and who have been current at that time.

Steps must be taken when a digital crimes happenred in a professional method: 1. Secure the crime scene till the forensic analyst arrive.

2. Forensic Analyst must 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 is no such thing as a any images has been taken.

4. If the computer is still powered on, do not turned off the computer. As an alternative, used a forensic tools comparable to Helix to get some data that can solely be found when the computer is still powered on, reminiscent of knowledge on RAM, and registries. Such instruments has it's particular operate 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 must be documented, in which chain of custody is used. Chain of Custody preserve records on the evidence, resembling: who has the proof for the last time.

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

8. Back within the lab, Forensic Analyst take the proof to create bit-stream image, as authentic 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 still used on this situation to keep data of the evidence.

9. Hash of the original proof 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 end in completely different hash, which makes the evidences discovered change into inadmissible in court.

10. Forensic Analyst starts to search out proof in the bit-stream image by carefully wanting on the corresponding location is determined by what sort of crime has happened. For example: Non permanent Internet Information, Slack Space, Deleted File, Steganography files.