THANK YOU FOR SUBSCRIBING
Enterprise Security Magazine | Thursday, November 17, 2022
Digital forensic analysts should be aware of various types of data acquisition methods, know when to choose one over another, and ensure that the chosen method does not damage the evidence in question.
FREMONT, CA: Digital forensic analysts should know how to access, recover, and restore hacked or corrupted data and how to protect it for future management. This involves producing a forensic image from digital devices and other computer technologies. Digital forensic analysts should be fully trained in the process of data acquisition. Along with them, data analysts, penetration testers, and ethical hackers also require data acquisition knowledge.
Certified computer examiners receive training in a range of data acquisition methods, as different situations may require the use of different techniques. Digital forensic investigators should know the various types of data acquisition methods and when to choose one over another. Above all, they must ensure that the chosen tactics do not damage the evidence in question.
Stay ahead of the industry with exclusive feature stories on the top companies, expert insights and the latest news delivered straight to your inbox. Subscribe today.
Bit-stream Disk-to-image Files
This is the most common data acquisition method in cybercrime events. It involves cloning a disc drive, allowing for the complete preservation of all necessary evidence. Programs to create bit-stream disk-to-image files include FTK, SMART, and ProDiscover, among others.
Bit-stream Disk-to-disk Files
When it is inconceivable to create an exact copy of a hard drive or network, different tools are used to create a disk-to-disk copy. While a few parameters of the hard drive may be changed, the files will remain the same.
Logical Acquisition
The logical acquisition involves collecting files related to the case under investigation. This method is typically used when an entire drive or network is too large to copy.
Sparse Acquisition
Five steps such as identification, preservation, analysis, documentation, and preservation, are involved in digital forensics investigation. The first stage involves ensuring that all files and evidence related to an investigation have been properly identified. This is done by examining the device or network in question and interviewing the individuals involved in the network breach. These individuals will have guidance for investigations or other useful information and will be able to tell how the breach in question occurred.
The second step is evidence preservation, involving the data maintained in the state where it is found for later examination and analysis. Nobody should be able to access the information in question, and after completing these stages, investigators can move on to copying, examining, and analysing the evidence.
Properly identifying and preserving evidence ensures better analysis. Accurately identified and preserved evidence helps digital forensic investigators understand how the data damage happened, what hacking methods were used, and how individuals and organisations can prevent similar cyber attacks in the future. Evidence should support these conclusions confirmed in the documentation stage. All the evidence is then placed into a presentation for others. Proper management of data acquisition is crucial in any investigation. However, it is only the first step in properly conducting digital forensics and protecting clients’ information.
More in News