Onnowpurbo: /* Pranala Menarik */

2015-09-21T01:19:15Z

Pranala Menarik

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	* [[Extract Metadata Word Document]]		* [[Extract Metadata Word Document]]
			* [[Metadata: Microsoft Word]]

Onnowpurbo at 01:10, 21 September 2015

2015-09-21T01:10:50Z

← Older revision		Revision as of 01:10, 21 September 2015
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	* [http://en.wikipedia.org/wiki/Metadata Wikipedia: Metadata]		* [http://en.wikipedia.org/wiki/Metadata Wikipedia: Metadata]
	* [http://theses.nps.navy.mil/08Jun_Migletz.pdf Automated Metadata Extraction],James Migletz, Master's Thesis, Naval Postgraduate School, June 2008		* [http://theses.nps.navy.mil/08Jun_Migletz.pdf Automated Metadata Extraction],James Migletz, Master's Thesis, Naval Postgraduate School, June 2008


			==Pranala Menarik==

			* [[Extract Metadata Word Document]]

Onnowpurbo: New page: '''Metadata''' is data about data. Metadata plays a number of important roles in computer forensics: * It can provide corroborating information about the document data itself. * It can...

2015-09-21T01:06:06Z

New page: '''Metadata''' is data about data. Metadata plays a number of important roles in computer forensics: * It can provide corroborating information about the document data itself. * It can...

New page

'''Metadata''' is data about data. Metadata plays a number of important roles in [[computer forensics]]:
* It can provide corroborating information about the document data itself.
* It can reveal information that someone tried to hide, delete, or obscure.
* It can be used to automatically correlate documents from different sources.

Since metadata is fundamentally data, it suffers all of the data quality and pedigre issues as any other form of data. Nevertheless, because metadata isn't generally visible unless you use a special tool, more skill is required to alter or otherwise manipulate it.

==Kinds of Metadata==
Some kinds of metadata that are interesting in computer forensics:
* [[File system]] metadata (e.g. [[MAC times]], [[access control lists]], etc.)
* Digital image metadata. Although information such as the image size and number of colors are technically metadata, [[JPEG]] and other file formats store additional data about the photo or the device that acquired it.
* Document metadata, such as the creator of a document, it's last print time, etc.

==File types that support metadata and extraction tools==

Below are some common data and metadata formats, the files in which they are found, and a collection of tools that can be used to extract information.

; [[EXIF]] ([[JPEG]] and [[TIFF]] image files; Music Files)
: The [[Exchangeable Image File]] format describes a format for a block of data that can be embedded into JPEG and TIFF image files, as well as [[RIFF WAVE]] audio files. Information includes date and time information, camera settings, location information, textual descriptions, and copyright information.
:* [http://pel.sourceforge.net/ PEL: PHP Exif Library]
:* [http://libexif.sourceforge.net/ LibExif] (C)
:* [http://www.drewnoakes.com/code/exif/ Metadata extraction in Java]
:* [http://digital-assembly.com/products/adroit-photo-forensics/ Adroit Photo Forensics]

; [[ID3]] ([[MP3]] files)
: Implemented as a small block of data stored at the end of MP3 files. [[ID3v1]] is a 128-byte block in a specified format allowing 30 bytes for song, artist and album, 4 bytes for year, 30 bytes for comment, and 1 byte for genre. [[ID3v1.1]] adds a track number. [[ID3v2]] is a general container structure. For more information, see [http://www.id3.org/].
:* [http://id3lib.sourceforge.net/ id3lib], a widely-used open source C/C++ ID3 implementation.
:* [http://www.vdheide.de/projects.html Java library MP3]
:* [http://search.cpan.org/dist/MP3-Info/ MP3::Info] (Perl)
:* [http://search.cpan.org/dist/MPEG-ID3v2Tag/ MPEG::ID3v2Tag] (Perl)

; [[Microsoft]] [[OLE Compound File]]
: Microsoft Office document files contain a huge amount of metadata. They are created as OLE Compound Files and mainly stored in the so called property set streams. Here are some tools for processing them:
:* [http://jakarta.apache.org/poi/index.html Jakarta POI] Open Source implementation in Java.
:* [http://www.payneconsulting.com/ Payne Consulting] Metadata Analysis and cleanup.
:* [http://www.inforenz.com/software/forager.html Inforenz Forager] Inforenz Forager

; [[TIFF]]
: The [[Tagged Image File Format]] allows one or more images to be bundled in a single file. Multiple [[compression]] formats are supported. [[EXIF]] files can be stored inside TIFFs.
:* [http://www.remotesensing.org/libtiff/ LibTIFF]
:* [http://www.awaresystems.be/imaging/tiff/faq.html TIFF FAQ]

=See Also=
[[Document_Metadata_Extraction]]

=External links=
* [http://en.wikipedia.org/wiki/Metadata Wikipedia: Metadata]
* [http://theses.nps.navy.mil/08Jun_Migletz.pdf Automated Metadata Extraction],James Migletz, Master's Thesis, Naval Postgraduate School, June 2008

Metadata - Revision history

Onnowpurbo: /* Pranala Menarik */

Onnowpurbo at 01:10, 21 September 2015

Onnowpurbo: New page: '''Metadata''' is data about data. Metadata plays a number of important roles in computer forensics: * It can provide corroborating information about the document data itself. * It can...