Information To Digital Forensics

Information To Digital Forensics

Computer forensics or digital forensics is a term in computer science to obtain legal evidence present in digital media or computers storage. With digital forensic investigation, the investigator can find what occurred to the digital media corresponding to emails, hard disk, logs, computer system, and the network itself. In many case, forensic investigation can produce how the crime may occurred and how we are able to shield ourselves in opposition to it subsequent time.

Some the reason why we need to conduct a forensic investigation: 1. To assemble evidences in order that it may be utilized in court docket to resolve authorized cases. 2. To research our network power, and to fill the security hole with patches and fixes. 3. To recover deleted information or any files within the event of hardware or software program failure

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

1. The unique evidence should not be altered in in any case, and to do conduct the process, forensic investigator should make a bit-stream image. Bit-stream image is a bit by bit copy of the unique storage medium and exact 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 space within the storage. You'll not discover any slack house info on a replica media.

2. All forensic processes must comply with the legal laws in corresponding nation where the crimes happened. Every nation has totally different law suit in IT field. Some take IT rules very critically, for instance: United Kingdom, Australia.

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

Forensic investigators would usually looking on the timeline of how the crimes occurred in well timed manner. With that, we will produce the crime scene about how, when, what and why crimes may happened. In a big company, it is suggested to create a Digital Forensic Workforce or First Responder Crew, so that the company might nonetheless preserve the evidence till the forensic investigator come to the crime scene.

First Response guidelines are: 1. On no account should anyone, with the exception of 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 data by person mentioned in number 1, abbotsford needs to be averted as it might compromise the integrity of the proof, by which grew to become inadmissible in authorized court.

Primarily based on that guidelines, it has already explained the vital roles of getting a First Responder Crew in a company. The unqualified particular person can only secure the perimeter in order that nobody can contact the crime scene until Forensic Analyst has come (This can be carried out by taking photograph of the crime scene. They will also make notes in regards to the scene and who have been present at that time.

Steps need to be taken when a digital crimes happenred in an expert method: 1. Safe the crime scene until the forensic analyst arrive.

2. Forensic Analyst should request for the search warrant from local 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 pictures has been taken.

4. If the computer continues to be powered on, don't turned off the computer. As a substitute, used a forensic tools reminiscent of Helix to get some data that can solely be discovered when the computer is still powered on, corresponding to data on RAM, and registries. Such tools has it is special perform as to not 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 have to be documented, in which chain of custody is used. Chain of Custody hold records on the evidence, similar to: who has the proof for the final time.

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

8. Back in the lab, Forensic Analyst take the evidence to create bit-stream image, as original evidence must not be used. Usually, 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 information of the evidence.

9. Hash of the unique proof and bit-stream image is created. This acts as a proof that unique 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 grow to be inadmissible in court.

10. Forensic Analyst begins to search out evidence within the bit-stream image by carefully trying at the corresponding location is determined by what kind of crime has happened. For instance: Short-term Internet Information, Slack Area, Deleted File, Steganography files.