Information To Digital Forensics

Information To Digital Forensics

Computer forensics or digital forensics is a time period in computer science to obtain legal proof present in digital media or computers storage. With digital forensic investigation, the investigator can discover what occurred to the digital media corresponding to emails, hard disk, logs, computer system, and the network itself. In lots of case, forensic investigation can produce how the crime could happened and the way we can shield ourselves against it next time.

Some the explanation why we have to conduct a forensic investigation: 1. To gather evidences so that it may be used in courtroom to resolve authorized cases. 2. To research our network strength, 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 program failure

In computer forensics, crucial things that have to 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 actual copy of the original media. The difference between a bit-stream image and Winnipeg normal copy of the original storage is bit-stream image is the slack area within the storage. You'll not discover any slack area data on a replica media.

2. All forensic processes must observe the legal legal guidelines in corresponding nation where the crimes happened. Each country has different regulation suit in IT field. Some take IT rules very severely, for example: 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 happened 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's steered to create a Digital Forensic Workforce or First Responder Crew, so that the corporate might still preserve the evidence until the forensic investigator come to the crime scene.

First Response guidelines are: 1. By no means should anybody, with the exception of Forensic Analyst, to make any makes an attempt to recover data from any computer system or machine that holds electronic information. 2. Any attempt to retrieve the data by particular person said in number 1, ought to be averted because it could compromise the integrity of the proof, through which grew to become inadmissible in authorized court.

Based mostly on that rules, it has already defined the important roles of having a First Responder Crew in a company. The unqualified particular person can only secure the perimeter in order that nobody can touch the crime scene till Forensic Analyst has come (This can be achieved by taking photo of the crime scene. They'll also make notes in regards to the scene and who were current at that time.

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

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

4. If the computer remains to be powered on, don't turned off the computer. As a substitute, used a forensic tools akin to Helix to get some information that can solely be found when the computer remains to be powered on, comparable to knowledge on RAM, and registries. Such tools has it is particular operate as not to write anything back to the system so the integrity stay intake.

5. Once 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 keep data on the evidence, resembling: who has the evidence for the final time.

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

8. Back in the lab, Forensic Analyst take the proof to create bit-stream image, as unique proof 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 maintain records of the evidence.

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

10. Forensic Analyst begins to search out evidence within the bit-stream image by rigorously wanting on the corresponding location relies on what sort of crime has happened. For instance: Momentary Internet Files, Slack Space, Deleted File, Steganography files.