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           S/MIME Version 2 Message Specification  
      
 -      This document describes a protocol for adding cryptographic signature    and encryption services to MIME data. The MIME standard [MIME-SPEC]    provides a general structure for the content type of Internet    messages and allows extensions for new content type applications.
      
   URL: http://www.antionline.com/cgi-bin/rfc/DisplayRFC.cgi?rfc=2311
      
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