Difference between pages "MD5" and "Pdfinfo"

From Forensics Wiki
(Difference between pages)
Jump to: navigation, search
m (Corrections)
 
(Infobox and categories.)
 
Line 1: Line 1:
−
The '''Message-Digest algorithm 5''' ('''MD5''') is a cryptographic [[hash|hash function]] that produces a 128-bit hash value. Originally developed in 1991, much as has been written about this algorithm. As such, this article concentrates only on its application to computer forensics.
+
{{Infobox_Software |
 +
  name = pdfinfo |
 +
  maintainer = [[Foo labs]] |
 +
  os = {{Cross-platform}} |
 +
  genre = {{Metadata}} |
 +
  license = {{GPL}} |
 +
  website = [http://www.foolabs.com/xpdf/ foolabs.com/xpdf/] |
 +
}}
  
−
== Tools ==
+
'''pdfinfo''' is a small utility which shows (parts of) the metadata stored in [[PDF]] files. It is part of the [[xpdf]] package.
  
−
On most [[Unix]] systems the tools [[digest]] -a md5 (Solaris), [[md5]] (BSD) or [[md5sum]] (GNU) can be used to compute the MD5 hash of a file or device. [[md5deep]] can compute MD5 hashes of whole directory trees.
+
== Example ==
  
−
== Weaknesses ==
+
$ pdfinfo nsa-redact.pdf
 +
Title:          Redacting with Confidence:  How to Safely Publish Sanitized Reports Converted from Word to PDF
 +
Subject:        I333-015R-2005
 +
Keywords:      word, pdf, redaction, metadata
 +
Author:        SNAC
 +
Creator:        activePDF DocConverter
 +
Producer:      5D PDFLib
 +
CreationDate:  Tue Jan 10 11:15:26 2006
 +
ModDate:        Fri Jan 20 09:05:43 2006
 +
Tagged:        no
 +
Pages:          14
 +
Encrypted:      no
 +
Page size:      612 x 792 pts (letter)
 +
File size:      681417 bytes
 +
Optimized:      yes
 +
PDF version:    1.3
  
−
Recently some cryptographic weaknesses have been found in MD5. Tool developers should avoid using MD5 in new products in favor of other hash functions like [[RIPEMD-160]], [[Tiger]], [[WHIRLPOOL]], [[SHA-256]] or [[SHA-512]]. Host Intrusion Detection systems and hash databases should also use multiple hash algorithms.
+
The <tt>-meta</tt> command line option shows some more metadata (in [[XML]] format).
−
 
+
−
== External Links ==
+
−
 
+
−
* [http://en.wikipedia.org/wiki/Md5 Wikipedia: MD5]
+
−
* [http://deepbyte.com/blog/2006/02/is_the_md5_hash_unreliable.html Is the MD5 hash unreliable?]
+
−
* [http://unixsadm.blogspot.com/2007/11/exploiting-md5-and-other-hashing.html Collection of exploits and weaknesses in MD5]
+
−
 
+
−
[[Category:Hashing]]
+

Latest revision as of 11:37, 6 May 2006

pdfinfo
Maintainer: Foo labs
OS: Cross-platform
Genre: Metadata
License: GPL
Website: foolabs.com/xpdf/

pdfinfo is a small utility which shows (parts of) the metadata stored in PDF files. It is part of the xpdf package.

Example 

$ pdfinfo nsa-redact.pdf
Title:          Redacting with Confidence:  How to Safely Publish Sanitized Reports Converted from Word to PDF
Subject:        I333-015R-2005
Keywords:       word, pdf, redaction, metadata
Author:         SNAC
Creator:        activePDF DocConverter
Producer:       5D PDFLib
CreationDate:   Tue Jan 10 11:15:26 2006
ModDate:        Fri Jan 20 09:05:43 2006
Tagged:         no
Pages:          14
Encrypted:      no
Page size:      612 x 792 pts (letter)
File size:      681417 bytes
Optimized:      yes
PDF version:    1.3

The -meta command line option shows some more metadata (in XML format).

Retrieved from "http://www.forensicswiki.org/w/index.php?title=MD5&oldid=2986"