Digital Forensics

Digital forensics encompasses the recovery and investigation of material found in digital devices, often in relation to computer crime. Digital forensics investigations have a variety of applications. The most common is to support or refute a hypothesis before criminal or civil (as part of the electronic discovery process) courts. The technical aspect of an investigation is divided into several sub-branches, relating to the type of digital devices involved; computer forensics, network forensics, forensic data analysis and mobile device forensics. The typical forensic process encompasses the seizure, forensic imaging (acquisition) and analysis of digital media and the production of a report into collected evidence.

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In this era, as you know, cybercrime and other sorts of frauds using the internet has increased day by day. We should protect our information assets and confidential information from getting exploiting by the attacker or intruders. Most of the fraud today is performed using email services. Intruder or Imposters send the emails to you pretending that the emails are coming from authenticated users and thereby get confidential information from you or about your organization. The imposter may manipulate or modify the email messages or attachments according to their benefits.

To protect from e-mail frauds using MS outlook and to save the messages from intruders, Microsoft Outlook provide a mechanism to deal with it known as digital signature and encryption of email messages.

Digital signature means digitally sign your document which identify the source of document (i.e. the documents is coming from or associated with the intended person which is sole owner of the document). In simple language a digital signature indicates the authenticity of a document. MS Outlook digitally signed the email using a digital ID formally known as a "digital certificate" which helps to prove the source identity. A digital signature helps prevent message tempering to protect the authenticity of your email message.
 

Before you digitally signed an e-mail message you need to create digital ID. Follow the steps below for creating digital ID that is being issued by certification authorities.

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The foremost challenge encountered by an investigator at the very beginning of a forensics investigation is, accessing a file/data to read/view its contents. Owing to the fact, a platform is necessary for both; opening as well as examining any file. However, deploying a platform each for the files to be examined is a tedious procedure to be followed out every time. Thus, the industry offers an extensive range of freeware utilities to bridge the gap. It isn’t a practically possible approach to possess a supporting application for every different file type an investigator comes across. However, keeping a mutual application handy for similar file types is feasible.

Here is a compilation of the top 10 free utilities that might come handy for forensic investigator’s requirements on an elementary level.

1. Oxygen Forensic® Suite 2015 Standard:
Specially dedicated to mobile forensics investigation, Oxygen Forensics has slowly upgraded its features with investigative usefulness. Cases involving the collection of evidence from mobile phones can be dealt with this utility in a Standard Edition (that can be collected on request from the vendor’s site). The tool features options to collect information from the device (OS, Manufacturer, S.no, IMEI, etc.), messages (SMS, Emails, Multimedia Message, etc.) and contact numbers, along with recovery of erased call records, messages and information from tasks and the calendar.

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Expert Comment

by:10023
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Thankyou!  Very useful
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Expert Comment

by:scott singh
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Encase is a popular tool used by investigators for investigating in forensics. There is also encase data recovery software used for recovering lost or deleted  encase or EWF files. I am giving here is a link about a encase data recovery software used to recover lost or deleted encase data.
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Digital Forensics

Digital forensics encompasses the recovery and investigation of material found in digital devices, often in relation to computer crime. Digital forensics investigations have a variety of applications. The most common is to support or refute a hypothesis before criminal or civil (as part of the electronic discovery process) courts. The technical aspect of an investigation is divided into several sub-branches, relating to the type of digital devices involved; computer forensics, network forensics, forensic data analysis and mobile device forensics. The typical forensic process encompasses the seizure, forensic imaging (acquisition) and analysis of digital media and the production of a report into collected evidence.

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