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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Clement, <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='text-indent:6.0pt'><font size=2 color=navy
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:navy'>Agree,
the question is not properly vetted and also agree that in ASYMMETRIC the total
number of keys is 20. <o:p></o:p></span></font></p>
<p class=MsoNormal style='text-indent:6.0pt'><font size=2 color=navy
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='text-indent:6.0pt'><font size=2 color=navy
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:navy'>Also,
agree in symmetric the total number of keys is N(N-1)/2.<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-indent:6.0pt'><font size=2 color=navy
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'> <o:p></o:p></span></font></p>
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<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>
cisspstudy-bounces@cccure.org [mailto:cisspstudy-bounces@cccure.org] <b><span
style='font-weight:bold'>On Behalf Of </span></b>Clement Dupuis<br>
<b><span style='font-weight:bold'>Sent:</span></b> Tuesday, January 19, 2010
4:07 PM<br>
<b><span style='font-weight:bold'>To:</span></b> The CISSP Study Mailing list<br>
<b><span style='font-weight:bold'>Cc:</span></b> twitwicki@hannaford.com<br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [Cisspstudy]
cisspstudy Digest, Vol 19, Issue 16</span></font><o:p></o:p></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='margin-bottom:12.0pt'><font size=3
face="Times New Roman"><span style='font-size:12.0pt'>Good day,<br>
<br>
I agree with Tom that it seems like the questions were definitively not vetted
properly.<br>
<br>
The total number of keys needed for asymmetric is simply total number of users
multiply by 2<br>
<br>
10 users is 20 keys that would be created overall. <br>
<br>
If it was Symmetric then you would use the formula: total number of users X
total number of users minus one divided by two. 10 x
(10-1)/2 which is 45 keys.<br>
<br>
For the second question: all the services would be provided using Digital
Signatures which can only be achieve within asymmetric crypto systems.
While creating the digital signature the hashing algorithm would be use.<br>
<br>
Take care<br>
<br>
Clement<br>
<br>
<br>
<o:p></o:p></span></font></p>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>On Tue, Jan 19, 2010 at 16:07, Nimal Gunarathna <<a
href="mailto:ng949@yahoo.com">ng949@yahoo.com</a>> wrote:<o:p></o:p></span></font></p>
<table class=MsoNormalTable border=0 cellspacing=0 cellpadding=0>
<tr>
<td valign=top style='padding:0in 0in 0in 0in;font-style:inherit;font-variant:
inherit;font-weight:inherit;font-size:inherit;line-height:inherit;font-size-adjust: inherit;
font-stretch: inherit'>
<p class=MsoNormal><font size=3 face=inherit><span style='font-size:12.0pt;
font-family:inherit'>Hi Tom,<o:p></o:p></span></font></p>
<div>
<p class=MsoNormal><font size=3 face=inherit><span style='font-size:12.0pt;
font-family:inherit'><o:p> </o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face=inherit><span style='font-size:12.0pt;
font-family:inherit'>This question puzzles me..<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face=inherit><span style='font-size:12.0pt;
font-family:inherit'>In an asymmetric system how many keys are required for
10 users to fully<br>
communicate?<o:p></o:p></span></font></p>
<div>
<p class=MsoNormal><font size=3 face=inherit><span style='font-size:12.0pt;
font-family:inherit'><o:p> </o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face=inherit><span style='font-size:12.0pt;
font-family:inherit'>Every user has a one private and a
one public key. I can send my same public<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face=inherit><span style='font-size:12.0pt;
font-family:inherit'>key to all others. For 10 people, 20 keys are needed.. I
am not sure how 110 come from?<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face=inherit><span style='font-size:12.0pt;
font-family:inherit'>Is this a private com session or just
a different comm session with each pair?<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face=inherit><span style='font-size:12.0pt;
font-family:inherit'><o:p> </o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face=inherit><span style='font-size:12.0pt;
font-family:inherit'>Thanks,<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face=inherit><span style='font-size:12.0pt;
font-family:inherit'><o:p> </o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face=inherit><span style='font-size:12.0pt;
font-family:inherit'>Nimal Gunarathna <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face=inherit><span style='font-size:12.0pt;
font-family:inherit'><o:p> </o:p></span></font></p>
<div>
<div>
<p class=MsoNormal><font size=3 face=inherit><span style='font-size:12.0pt;
font-family:inherit'><o:p> </o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face=inherit><span style='font-size:12.0pt;
font-family:inherit'><o:p> </o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face=inherit><span style='font-size:12.0pt;
font-family:inherit'>--- On <b><span style='font-weight:bold'>Tue, 1/19/10, <a
href="mailto:cisspstudy-request@cccure.org" target="_blank">cisspstudy-request@cccure.org</a>
<i><span style='font-style:italic'><<a
href="mailto:cisspstudy-request@cccure.org" target="_blank">cisspstudy-request@cccure.org</a>></span></i></span></b>
wrote:<o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-bottom:12.0pt'><font size=3 face=inherit><span
style='font-size:12.0pt;font-family:inherit'><br>
From: <a href="mailto:cisspstudy-request@cccure.org" target="_blank">cisspstudy-request@cccure.org</a>
<<a href="mailto:cisspstudy-request@cccure.org" target="_blank">cisspstudy-request@cccure.org</a>><br>
Subject: cisspstudy Digest, Vol 19, Issue 16<br>
To: <a href="mailto:cisspstudy@cccure.org" target="_blank">cisspstudy@cccure.org</a><br>
Date: Tuesday, January 19, 2010, 11:00 AM<o:p></o:p></span></font></p>
<div>
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When replying, please edit your Subject line so it is more specific<br>
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<br>
Today's Topics:<br>
<br>
1. cisspstudy - Cryptography questions (<a
href="http://mc/compose?to=twitwicki@hannaford.com" target="_blank">twitwicki@hannaford.com</a>)<br>
2. Re: New to CISSP Cert (Mark Price)<br>
3. Re: New to CISSP Cert (jack wang)<br>
4. Re: New to CISSP Cert (Jeronimo Zucco)<br>
<br>
<br>
----------------------------------------------------------------------<br>
<br>
Message: 1<br>
Date: Mon, 18 Jan 2010 14:48:26 -0500<br>
From: <a href="http://mc/compose?to=twitwicki@hannaford.com" target="_blank">twitwicki@hannaford.com</a><br>
To: <a href="http://mc/compose?to=cisspstudy@cccure.org" target="_blank">cisspstudy@cccure.org</a><br>
Subject: [Cisspstudy] cisspstudy - Cryptography questions<br>
Message-ID:<br>
<<a
href="http://mc/compose?to=OF8F407D94.BBDB76DE-ON852576AF.006B4314-852576AF.006CCD97@hannaford.com"
target="_blank">OF8F407D94.BBDB76DE-ON852576AF.006B4314-852576AF.006CCD97@hannaford.com</a>><br>
<br>
Content-Type: text/plain; charset=US-ASCII<br>
<br>
<br>
<br>
Hello all,<br>
I'd like your thoughts on these questions from Michael
Gregg's CISSP<br>
Practice questions:<br>
<br>
In an asymmetric system how many keys are required for 10 users to fully<br>
communicate?<br>
<br>
A. 10<br>
B. 20<br>
C. 45<br>
D 110<br>
<br>
The answer states D. 110 - "Each user would have his private, phus
his<br>
public key, plus each of the nine other public keys"<br>
Shouldn't the answer be B. 20 because the public keys is only couned
once<br>
for each private/public pair? This also seems consistent with the
formula<br>
for symmetric keys: N(N-1)/2 where N is the number of users needing to<br>
communicate. In this case the secret key is only counted once even if
it's<br>
shared between users.<br>
<br>
<br>
Here's another question that has me puzzled:<br>
<br>
Which cryptographic system can be used for integrity, authenticity and<br>
non-repudiation?<br>
<br>
A. Asymmetric encryption<br>
B. Symmetric encryption<br>
C. Hashing<br>
D. None of the above<br>
<br>
The answers states A. Asymmetric. Shouldn't the answer be D. None of
the<br>
above because Hashing is needed for integrity?<br>
<br>
Your thoughts will be much appreciated.<br>
<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>
<br>
------------------------------<br>
<br>
Message: 2<br>
Date: Mon, 18 Jan 2010 21:47:45 +0000<br>
From: "Mark Price" <<a
href="http://mc/compose?to=prinext@gmail.com" target="_blank">prinext@gmail.com</a>><br>
To: "The CISSP Study Mailing list" <<a
href="http://mc/compose?to=cisspstudy@cccure.org" target="_blank">cisspstudy@cccure.org</a>><br>
Subject: Re: [Cisspstudy] New to CISSP Cert<br>
Message-ID:<br>
<<a
href="http://mc/compose?to=1180962559-1263851266-cardhu_decombobulator_blackberry.rim.net-147941822-@bda153.bisx.prod.on.blackberry"
target="_blank">1180962559-1263851266-cardhu_decombobulator_blackberry.rim.net-147941822-@bda153.bisx.prod.on.blackberry</a>><br>
<br>
Content-Type: text/plain<br>
<br>
I have heard each edition is an update of the previous plus more of the
latest technology and or standards. <br>
I have the 4th and the DVD set, they plus <a href="http://cccure.org"
target="_blank">cccure.org</a> worked for me.<br>
V/r,<br>
<br>
Mark Price<br>
PRINEXT<br>
c:240-743-7654<br>
<a href="http://mc/compose?to=mprice@prinext.com" target="_blank">mprice@prinext.com</a><br>
<a href="http://www.prinext.com" target="_blank">www.prinext.com</a><br>
<br>
-----Original Message-----<br>
From: Cert Prep <<a href="http://mc/compose?to=bugtraq.mailbox@gmail.com"
target="_blank">bugtraq.mailbox@gmail.com</a>><br>
Date: Mon, 18 Jan 2010 13:22:40 <br>
To: The CISSP Study Mailing list<<a
href="http://mc/compose?to=cisspstudy@cccure.org" target="_blank">cisspstudy@cccure.org</a>><br>
Subject: Re: [Cisspstudy] New to CISSP Cert<br>
<br>
Thanks Jeronimo. I will listen to it.<br>
<br>
I have Shon Harris Second Edition which I bought many years back. I<br>
have heard that 5th edition is about to come. Is it ok to prepare from<br>
second edition until 5th edition is out? Does anybody know the<br>
differences between 2nd and 4th? I am sure there will be many but are<br>
those drastic to the extent that I will have to revise the stuff,<br>
which I have already gone through using second edition, from 5th<br>
edition once it is published?<br>
<br>
Any help would be appreciated.<br>
<br>
Thanks.<br>
Adam<br>
<br>
On Mon, Jan 18, 2010 at 12:51 PM, Jeronimo Zucco <<a
href="http://mc/compose?to=jczucco@gmail.com" target="_blank">jczucco@gmail.com</a>>
wrote:<br>
> 2010/1/18 Cert Prep <<a
href="http://mc/compose?to=bugtraq.mailbox@gmail.com" target="_blank">bugtraq.mailbox@gmail.com</a>>:<br>
>> Hi Folks,<br>
>><br>
>> I am planning to prepare for CISSP Cert and would like to know which<br>
>> book or material is best for the preparations.<br>
><br>
><br>
> <a href="http://www.cccure.org/flash/intro/player.html" target="_blank">http://www.cccure.org/flash/intro/player.html</a><br>
><br>
><br>
><br>
> --<br>
> Jeronimo Zucco<br>
> <a href="http://jczucco.blogspot.com" target="_blank">http://jczucco.blogspot.com</a><br>
><br>
> _______________________________________________<br>
> cisspstudy mailing list<br>
> <a href="http://mc/compose?to=cisspstudy@cccure.org" target="_blank">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>
><br>
<br>
_______________________________________________<br>
cisspstudy mailing list<br>
<a href="http://mc/compose?to=cisspstudy@cccure.org" target="_blank">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>
<br>
------------------------------<br>
<br>
Message: 3<br>
Date: Tue, 19 Jan 2010 20:05:00 +0800<br>
From: jack wang <<a href="http://mc/compose?to=windjie@gmail.com"
target="_blank">windjie@gmail.com</a>><br>
To: The CISSP Study Mailing list <<a
href="http://mc/compose?to=cisspstudy@cccure.org" target="_blank">cisspstudy@cccure.org</a>><br>
Subject: Re: [Cisspstudy] New to CISSP Cert<br>
Message-ID:<br>
<<a
href="http://mc/compose?to=3c43566f1001190405t2bfd204as4a953dd160a5b92b@mail.gmail.com"
target="_blank">3c43566f1001190405t2bfd204as4a953dd160a5b92b@mail.gmail.com</a>><br>
Content-Type: text/plain; charset="iso-8859-1"<br>
<br>
Shon Harris Second Edition,plus <a href="http://www.cccure.org"
target="_blank">www.cccure.org</a>,they are enough<br>
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<br>
------------------------------<br>
<br>
Message: 4<br>
Date: Tue, 19 Jan 2010 10:34:19 -0200<br>
From: Jeronimo Zucco <<a href="http://mc/compose?to=jczucco@gmail.com"
target="_blank">jczucco@gmail.com</a>><br>
To: The CISSP Study Mailing list <<a
href="http://mc/compose?to=cisspstudy@cccure.org" target="_blank">cisspstudy@cccure.org</a>><br>
Subject: Re: [Cisspstudy] New to CISSP Cert<br>
Message-ID:<br>
<<a
href="http://mc/compose?to=2d6b298c1001190434i6f1eb72ct1157b63b80fe9301@mail.gmail.com"
target="_blank">2d6b298c1001190434i6f1eb72ct1157b63b80fe9301@mail.gmail.com</a>><br>
Content-Type: text/plain; charset=ISO-8859-1<br>
<br>
All-in_one edition 5:<br>
<br>
<a
href="http://www.amazon.com/CISSP-All-One-Guide-Fifth/dp/0071602178/ref=sr_1_2?ie=UTF8&s=books&qid=1263898897&sr=8-2"
target="_blank">http://www.amazon.com/CISSP-All-One-Guide-Fifth/dp/0071602178/ref=sr_1_2?ie=UTF8&s=books&qid=1263898897&sr=8-2</a><br>
<br>
I always recommend the last edition, because of updates and<br>
corretions. Or you can read all erratas for your edition.<br>
<br>
2010/1/19 jack wang <<a href="http://mc/compose?to=windjie@gmail.com"
target="_blank">windjie@gmail.com</a>>:<br>
> ?Shon Harris Second Edition,plus <a href="http://www.cccure.org"
target="_blank">www.cccure.org</a>,they are enough<br>
><br>
<br>
<br>
-- <br>
Jeronimo Zucco<br>
<a href="http://jczucco.blogspot.com" target="_blank">http://jczucco.blogspot.com</a><br>
<br>
<br>
<br>
------------------------------<br>
<br>
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<br>
<br>
End of cisspstudy Digest, Vol 19, Issue 16<br>
******************************************<o:p></o:p></span></font></p>
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