<table cellspacing="0" cellpadding="0" border="0" ><tr><td valign="top" style="font: inherit;"><DIV>Good Luck Tom,</DIV><FONT face=TimesNewRoman>
<P align=left>Polymorphism means makes copies of objects and makes changes to those copies; it is related to an object-oriented programming language like Java and C++, it is not related to the database view and that is the major differnce.</DIV>
<P align=left>Polyinstantiation is related to the database view which means multiple distinct differences between data within objects to discourage lower-level subjects from learning information at a higher-level of security.</DIV></FONT><FONT face=TimesNewRoman>
<DIV>Thanks</DIV>
<DIV>AbuHuraia</FONT><BR><BR>--- On <B>Thu, 2/11/10, twitwicki@hannaford.com <I><twitwicki@hannaford.com></I></B> wrote:<BR></DIV>
<BLOCKQUOTE style="BORDER-LEFT: rgb(16,16,255) 2px solid; PADDING-LEFT: 5px; MARGIN-LEFT: 5px"><BR>From: twitwicki@hannaford.com <twitwicki@hannaford.com><BR>Subject: Re: [CCCure CISSP] CISSPstudy Digest, Vol 20 Polyinstantiation vs Polymorphism?<BR>To: cisspstudy@cccure.org<BR>Date: Thursday, February 11, 2010, 8:49 AM<BR><BR>
<DIV class=plainMail><BR><BR>All,<BR> Here's a question that come out of a sample question that I've been<BR>puzzling over:<BR><BR>Are Database Views an example of Polymorphism or Polyinstantiation?<BR>The case for Polymorphism is that the different output is produced from the<BR>same input to two different objects - the "objects" in this case being<BR>different views of the database. This is the author's answer.<BR>The case for Polyinstantiation is that it is frequently used to<BR>hide/replace attributes that may not be accessed by a lower security level<BR>such as in preventing inference attacks.<BR><BR>Any insight from the group would be appreciated. By the way, my exam date<BR>is Feb 20 in Boston. I feel prepared, but there is a lot of material and<BR>my fear is that some questions may go deeper into some areas. Wish me<BR>luck!<BR><BR>Tom Witwicki, CIPP<BR>Director, Information Security<BR>Hannaford Bros.
Co.<BR>207-885-2073<BR><BR>Join me on Linkedin!<BR><A href="http://www.linkedin.com/in/tomwitwicki" target=_blank>http://www.linkedin.com/in/tomwitwicki</A><BR><BR><BR><BR><BR><BR>_______________________________________________<BR>CISSPstudy mailing list<BR><A href="http://us.mc542.mail.yahoo.com/mc/compose?to=CISSPstudy@cccure.org" ymailto="mailto:CISSPstudy@cccure.org">CISSPstudy@cccure.org</A><BR><A href="http://cccure.org/mailman/listinfo/cisspstudy_cccure.org" target=_blank>http://cccure.org/mailman/listinfo/cisspstudy_cccure.org</A><BR></DIV></BLOCKQUOTE></td></tr></table><br>