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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN"><HTML><HEAD> <TITLE>Maximum Security -- Appendix C -- A Hidden Message About the Internet</TITLE></HEAD><BODY TEXT="#000000" BGCOLOR="#FFFFFF"><CENTER><H1><IMG SRC="../button/samsnet.gif" WIDTH="171" HEIGHT="66" ALIGN="BOTTOM" BORDER="0"><BR><FONT COLOR="#000077">Maximum Security: </FONT></H1></CENTER><CENTER><H2><FONT COLOR="#000077">A Hacker's Guide to Protecting Your Internet Site and Network</FONT></H2></CENTER><CENTER><P><A HREF="../apb/apb.htm"><IMG SRC="../button/previous.gif" WIDTH="128" HEIGHT="28"ALIGN="BOTTOM" ALT="Previous chapter" BORDER="0"></A><A HREF="../apd/apd.htm"><IMGSRC="../button/next.gif" WIDTH="128" HEIGHT="28" ALIGN="BOTTOM" ALT="Next chapter"BORDER="0"></A><A HREF="../index.htm"><IMG SRC="../button/contents.gif" WIDTH="128"HEIGHT="28" ALIGN="BOTTOM" ALT="Contents" BORDER="0"></A> <HR></CENTER><CENTER><H1><FONT COLOR="#000077">C</FONT></H1></CENTER><CENTER><H1><FONT COLOR="#000077">A Hidden Message About the Internet</FONT></H1></CENTER><P>On the CD-ROM accompanying this book, you'll find a directory called <TT>message</TT>.Within it are two files: <TT>message.pgp</TT> and <TT>keys.asc</TT>. <TT>message.pgp</TT>is a small file, encrypted in 1024-bit PGP, that contains a hidden message. <TT>keys.asc</TT>is an ASCII file containing the PGP key generated for the hidden message. Your missionis to crack this hidden message by determining the passphrase used to encrypt it.This is not as difficult as it seems; it requires ingenuity rather than any particularcracking tool.</P><P>Following is a single line of clear text; your job is to determine the significanceof that text. Having done so, you can crack the encrypted text. The public key usedwas <TT>root@netherworld.net</TT>. The passphrase is composed of the significantstrings you derive from the clear text. (These are not difficult to decode; theirmeanings are actually quite obvious if you apply yourself.) The clear text fieldsare separated by semicolons. That means the passphrase is a series of text strings.Examples of such text strings might be any of the following:<UL> <LI>A line from a Shakespearean play <LI>A time, place, or person <LI>A name</UL><P>Each string will be in perfectly understandable English. Piece them together inorder, and you will have the passphrase. This will serve as the private key necessaryto decrypt the message.</P><P>Here is a powerful hint, and the only one I will give: The field separator (semicolon)represents one space, one dash, and one space. Thus, fields separated by semicolonsin the following clear text represent phrases separated by a space, a dash, and aspace. So if the hidden message was <TT>apples oranges pears</TT>, it would be writtenthis way:</P><PRE><FONT COLOR="#0066FF">apples - oranges - pears</FONT></PRE><P>The message contained within that file is very serious. It relates a criticalpoint about the Internet--one that even many security experts might have missed.That point will undoubtedly be a matter of some debate.</P><P>Good luck.</P><P>Clear text:</P><P><TT>4X755(4X230.4);abydos;072899;9:11;13:17</TT></P><H1><TT></TT></H1><CENTER><P><HR><A HREF="../apb/apb.htm"><IMG SRC="../button/previous.gif" WIDTH="128" HEIGHT="28"ALIGN="BOTTOM" ALT="Previous chapter" BORDER="0"></A><A HREF="../apd/apd.htm"><IMGSRC="../button/next.gif" WIDTH="128" HEIGHT="28" ALIGN="BOTTOM" ALT="Next chapter"BORDER="0"></A><A HREF="../index.htm"><IMG SRC="../button/contents.gif" WIDTH="128"HEIGHT="28" ALIGN="BOTTOM" ALT="Contents" BORDER="0"></A> <BR><BR><BR><IMG SRC="../button/corp.gif" WIDTH="284" HEIGHT="45" ALIGN="BOTTOM" ALT="Macmillan Computer Publishing USA"BORDER="0"></P><P>© <A HREF="../copy.htm">Copyright</A>, Macmillan Computer Publishing. Allrights reserved.</CENTER></BODY></HTML>⌨️ 快捷键说明
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