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?>
<div id="book.ssdeep" class="book">
 
 <h1 class="title">ssdeep Fuzzy Hashing</h1>
 

 <div id="intro.ssdeep" class="preface">
  <h1 class="title">Introduction</h1>
  <p class="simpara">
   ssdeep is a utility for creating and comparing fuzzy hashes or
   <a href="http://dfrws.org/2006/proceedings/12-Kornblum.pdf" class="link external">&raquo;&nbsp;context-triggered piecewise
   hashing</a>.
  </p>
  <p class="simpara">
   Fuzzy hashing can match signatures which have &quot;...sequences of identical
   bytes in the same order, although bytes in between these sequences
   may be different in both content and length&quot; (<a href="http://ssdeep.sourceforge.net" class="link external">&raquo;&nbsp;
   ssdeep project page</a>).
  </p>
  <p class="simpara">
   This extension provides functions for creating and comparing fuzzy hashes.
  </p>
 </div>

 




 
 







<ul class="chunklist chunklist_book"><li><a href="ssdeep.setup.php">Installing/Configuring</a><ul class="chunklist chunklist_book chunklist_children"><li><a href="ssdeep.requirements.php">Requirements</a></li><li><a href="ssdeep.installation.php">Installation</a></li></ul></li><li><a href="ref.ssdeep.php">ssdeep Functions</a><ul class="chunklist chunklist_book chunklist_children"><li><a href="function.ssdeep-fuzzy-compare.php">ssdeep_fuzzy_compare</a> — Calculates the match score between two fuzzy hash signatures</li><li><a href="function.ssdeep-fuzzy-hash.php">ssdeep_fuzzy_hash</a> — Create a fuzzy hash from a string</li><li><a href="function.ssdeep-fuzzy-hash-filename.php">ssdeep_fuzzy_hash_filename</a> — Create a fuzzy hash from a file</li></ul></li></ul></div><?php manual_footer($setup); ?>