Information To Digital Forensics

Information To Digital Forensics

Computer forensics or digital forensics is a time period in computer science to acquire legal proof present in digital media or computers storage. With digital forensic investigation, the investigator can find what occurred to the digital media such as emails, hard disk, logs, computer system, and the network itself. In lots of case, forensic investigation can produce how the crime may happened and how we are able to defend ourselves against it subsequent time.

Some the explanation why we need to conduct a forensic investigation: 1. To assemble evidences in order that it may be utilized in court to unravel legal cases. 2. To investigate our network strength, and to fill the safety hole with patches and fixes. 3. To recuperate deleted files or any recordsdata within the event of hardware or software program failure

In computer forensics, an important issues that must be remembered when conducting the investigation are:

1. The original evidence must 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 original storage medium and actual copy of the unique media. The difference between a bit-stream image and regular copy of the unique storage is bit-stream image is the slack area in the storage. You'll not find any slack house info on a replica media.

2. All forensic processes must comply with the legal legal guidelines in corresponding nation where the crimes happened. Every nation has different legislation suit in IT field. Some take IT rules very severely, for example: United Kingdom, Australia.

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

Forensic investigators would normally looking at the timeline of how the crimes occurred in timely manner. With that, we will produce the crime scene about how, when, what and why crimes may happened. In a big firm, it is instructed to create a Digital Forensic Group or First Responder Crew, so that the corporate might nonetheless protect the proof until the forensic investigator dfi come to the crime scene.

First Response guidelines are: 1. In no way should anyone, aside from Forensic Analyst, to make any attempts to get well data from any computer system or device that holds digital information. 2. Any try and retrieve the information by particular person said in number 1, must be avoided because it could compromise the integrity of the evidence, wherein turned inadmissible in authorized court.

Primarily based on that rules, it has already defined the necessary roles of getting a First Responder Group in a company. The unqualified person can solely safe the perimeter in order that nobody can contact the crime scene till Forensic Analyst has come (This may be executed by taking photograph of the crime scene. They'll additionally make notes concerning the scene and who have been current at that time.

Steps must be taken when a digital crimes happenred in knowledgeable approach: 1. Safe the crime scene until 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 an image of the crime scene in case of if there is no any pictures has been taken.

4. If the computer remains to be powered on, don't turned off the computer. Instead, used a forensic instruments resembling Helix to get some data that can only be discovered when the computer remains to be powered on, comparable to information on RAM, and registries. Such tools has it is special operate as not to write something back to the system so the integrity stay intake.

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

6. All the evidences must be documented, by which chain of custody is used. Chain of Custody hold records on the proof, corresponding to: who has the proof for the last time.

7. Securing the proof must be accompanied by legal officer akin to police as a formality.

8. Back within the lab, Forensic Analyst take the evidence to create bit-stream image, as authentic evidence must not be used. Normally, Forensic Analyst will create 2-5 bit-stream image in case 1 image is corrupted. After all Chain of Custody still used on this state of affairs to maintain data of the evidence.

9. Hash of the original evidence and bit-stream image is created. This acts as a proof that original evidence and the bit-stream image is the exact copy. So any alteration on the bit image will result in different hash, which makes the evidences discovered turn into inadmissible in court.

10. Forensic Analyst starts to find proof in the bit-stream image by rigorously looking at the corresponding location is determined by what kind of crime has happened. For example: Temporary Internet Information, Slack Space, Deleted File, Steganography files.