[Cisspstudy] Databases and cryptography
Andrea Gatta
andrea.gatta at gmail.com
Mon Sep 21 14:46:59 EDT 2009
Thanks Clement.
Coming back to the my original post I guess that one way to look at
availability in the context of cryptography is "as a ramification" as
opposed as a service.
At least I believe this is what the question I have mentioned in my post was
trying to get out of the unlucky CISSP candidate.
Anyway for completeness'sake here is what page 226 of the ISC2 official
giude to CBK states:
" Uses of cryptography
Availability. Cryptography supports all three of the core principles of
information security. Many access control systems use cryptography to limit
access to systems through the use pf passwords. Many token-based
authentication systems use cryptography cased hash algorithm to compute
one-time passwords.Denying unauthorized access prevents an attacker from
entering and damaging the system or network, thereby denying access to
authorized access
"
Any additional thoughts ?
Andrea
On Mon, Sep 21, 2009 at 6:32 PM, Clement Dupuis
<clement.dupuis at cccure.com>wrote:
> WOW, what a fantastic thread.
>
> Let's face it, the official ISC2 book has a LARGE number of errors
> throughout the book. I am not talking about a few errors but dozens of
> errors.
>
> The book was written by 13 different authors who have their own style of
> writing, they even contradict themselves like this thread about
> availability. There are availability related to cryptography such as
> loosing your private key with no key escrow, however encryption does not
> address availability.
>
> I have errata for the ISC2 book on CCCure.Org, do a search for: errata
> using the search field at the top of the main page.
>
> Do not take for granted that because it is the official book it is
> accurate. So far it seems to be to the contrary.
>
> I would use Shon's books as my main study tool and the official book only
> as a checklist and reference.
>
> This is only my opinion
>
> Do take care
>
> Clement
>
>
> Clément Dupuis, CD
> CISSP, GCFW, GCIA, QEH, QSA, Security+, CEH, ECSA, LPT, CCSA, CCSE, MBNS,
> MBIS, MBHS, ACE
>
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> On Mon, Sep 21, 2009 at 13:02, Sergio Pantoja <spantoja at gmail.com> wrote:
>
>> IMHO, a exam may not lead to answer a question because they said so in a
>> book, i hope the exam really test your experience in the field and your
>> understanding of the security topics to help you have a broader/holistic
>> approach.
>>
>>
>> On Mon, Sep 21, 2009 at 12:45 PM, () <rlhj71 at yahoo.com> wrote:
>>
>>> On page 219 of the ISC2 book, it states that "The cryptography domain
>>> addresses the principles, means, and methods of disguising information to
>>> ensure its integrity, confidentiality, and authenticity. UNLIKE THE OTHER
>>> DOMAINS, CRYPTOGRAPHY DOES NOT SUPPORT THE STANDARD OF AVAILABILITY."
>>>
>>> --- On *Mon, 9/21/09, cisspstudy-request at cccure.org <
>>> cisspstudy-request at cccure.org>* wrote:
>>>
>>>
>>> From: cisspstudy-request at cccure.org <cisspstudy-request at cccure.org>
>>> Subject: cisspstudy Digest, Vol 15, Issue 29
>>> To: cisspstudy at cccure.org
>>> Date: Monday, September 21, 2009, 10:38 AM
>>>
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>>>
>>> Today's Topics:
>>>
>>> 1. Re: Databases and cryptography (Holland, Brandon)
>>> 2. Re: Databases and cryptography (Andrea Gatta)
>>>
>>>
>>> ----------------------------------------------------------------------
>>>
>>> Message: 1
>>> Date: Mon, 21 Sep 2009 08:57:24 -0500
>>> From: "Holland, Brandon" <hollandb at frmaint.com<http://us.mc1102.mail.yahoo.com/mc/compose?to=hollandb@frmaint.com>
>>> >
>>> To: "The CISSP Study Mailing list" <cisspstudy at cccure.org<http://us.mc1102.mail.yahoo.com/mc/compose?to=cisspstudy@cccure.org>
>>> >
>>> Subject: Re: [Cisspstudy] Databases and cryptography
>>> Message-ID:
>>> <58B3233454132D468C5F0D655003DA6411FDB100 at MAIL.frmaint.com<http://us.mc1102.mail.yahoo.com/mc/compose?to=58B3233454132D468C5F0D655003DA6411FDB100@MAIL.frmaint.com>
>>> >
>>> Content-Type: text/plain; charset="us-ascii"
>>>
>>>
>>> You're right, I can't seem to find anything anywhere in there as well.
>>> I have been studying Shon Harris mainly, but did study some SANS CISSP
>>> course material as well. I remember having a conversation about
>>> cryptography and availability with a CISSP (we have multiple) at work.
>>> The conclusion was confidentiality hinders availability... but that
>>> must've been wrong. (Or it definitely is for the test.)
>>>
>>> It's plain as day in the official guide:
>>> "Cryptography supports all three of the core principles of information
>>> security." The concept being by limiting access to only authorized
>>> individuals you are somehow making the system more available since
>>> unauthorized users can't get in to destroy the system.
>>>
>>> I can see that to some extent... but do you REALLY have to be authorized
>>> to break a system? Does a DOS require successful authentication - not
>>> normally.
>>>
>>> I KNOW I read this somewhere with the opposite outcome as the answer but
>>> not sure where it came from now.
>>>
>>> At least all this talk about it will have me remembering this answer on
>>> the test, even if I don't agree with it.
>>>
>>> Thanks,
>>> Brandon
>>>
>>> -----Original Message-----
>>> From: cisspstudy-bounces at cccure.org<http://us.mc1102.mail.yahoo.com/mc/compose?to=cisspstudy-bounces@cccure.org>
>>> [mailto:cisspstudy-bounces at cccure.org<http://us.mc1102.mail.yahoo.com/mc/compose?to=cisspstudy-bounces@cccure.org>]
>>> On Behalf Of Jordan, Lemuel CTR
>>> Sent: Monday, September 21, 2009 8:26 AM
>>> To: The CISSP Study Mailing list
>>> Subject: Re: [Cisspstudy] Databases and cryptography
>>>
>>>
>>> I just scanned through chapter 8 of the Shon Harris Book, and did not
>>> find
>>> any discussion on "availability". Do you happen to remember which area
>>> of
>>> the book you saw this about cryptography hurting availability.
>>>
>>> I plan to take the test in Nov or Dec, things like this make me worry
>>> also.
>>>
>>> Lem
>>>
>>>
>>> -----Original Message-----
>>> From: cisspstudy-bounces at cccure.org<http://us.mc1102.mail.yahoo.com/mc/compose?to=cisspstudy-bounces@cccure.org>
>>> [mailto:cisspstudy-bounces at cccure.org<http://us.mc1102.mail.yahoo.com/mc/compose?to=cisspstudy-bounces@cccure.org>
>>> ]
>>> On Behalf Of Holland, Brandon
>>> Sent: Monday, September 21, 2009 8:58 AM
>>> To: The CISSP Study Mailing list
>>> Subject: Re: [Cisspstudy] Databases and cryptography
>>>
>>> That worries me. I plan on taking the test Nov or Dec, and now am
>>> wondering if I should effectively flush what I've learned from Shon
>>> Harris and read the ISC2 Official guide for those crazy "just for the
>>> test" answers like that. I am too lazy to look right now, but am SURE
>>> that the CISSP Shon Harris book I read says cryptography actually HURTS
>>> availability... because u are specifically limiting availability by
>>> obscuring the data. It's like another "hoop" you have to go through
>>> before having your data available. And if you can't get through it,
>>> your data is unavailable.
>>>
>>> -----Original Message-----
>>> From: cisspstudy-bounces at cccure.org<http://us.mc1102.mail.yahoo.com/mc/compose?to=cisspstudy-bounces@cccure.org>
>>> [mailto:cisspstudy-bounces at cccure.org<http://us.mc1102.mail.yahoo.com/mc/compose?to=cisspstudy-bounces@cccure.org>]
>>> On Behalf Of Andrea Gatta
>>> Sent: Saturday, September 19, 2009 7:27 PM
>>> To: The CISSP Study Mailing list
>>> Subject: Re: [Cisspstudy] Databases and cryptography
>>>
>>> Well, that is true. But just based on the fact that ISC2 looks very much
>>> concerned about keys get lost/corrupted.
>>>
>>> On the other hand the last answer - which is sadly the one I picked up -
>>> looks quite reasonable.
>>>
>>> As a note - looking at the crypto chapter in the ISC2 book it looks
>>> pretty clear that they consider availability as one one of the security
>>> services offered by cryptography (page 226). I am sure that availability
>>> is not mentioned as a crypto sec service in any other book (but I will
>>> look into it).
>>>
>>> Andrea
>>>
>>>
>>> On Sun, Sep 20, 2009 at 1:15 AM, Mike Archuleta <mlarchuleta at gmail.com<http://us.mc1102.mail.yahoo.com/mc/compose?to=mlarchuleta@gmail.com>
>>> >
>>> wrote:
>>>
>>>
>>> Well if you follow the chain of thought from the last question.
>>> If a digruntled employee has access. YES
>>>
>>> Sent from my iPhone
>>>
>>> On Sep 19, 2009, at 6:01 PM, Andrea Gatta
>>> <andrea.gatta at gmail.com<http://us.mc1102.mail.yahoo.com/mc/compose?to=andrea.gatta@gmail.com>>
>>> wrote:
>>>
>>>
>>>
>>> Another thing I have noticed with cryptography is that
>>> ISC2 tends to riconduct all risks/downsides if cryptography not to
>>> breach of disclosure as one would thing but instead to (again)
>>> availability, this time in the technical sense (below one example but I
>>> am sure I had others):
>>>
>>> What is the primary risk of using cryptographic
>>> protection for systems or data:
>>>
>>> - loss of the system means loss of all data
>>>
>>> - a hardware failure may lead to lost data or system
>>> integrity
>>>
>>> - a disgruntled user may lead to denial of service
>>>
>>> - an employee may may hide is activities from the
>>> security department
>>>
>>> Obviously (now) the third aswer is the correct one
>>>
>>> Andrea
>>>
>>>
>>>
>>>
>>>
>>>
>>> On Sun, Sep 20, 2009 at 12:51 AM, Mike Archuleta <
>>> <mailto:mlarchuleta at gmail.com<http://us.mc1102.mail.yahoo.com/mc/compose?to=mlarchuleta@gmail.com>>
>>> mlarchuleta at gmail.com<http://us.mc1102.mail.yahoo.com/mc/compose?to=mlarchuleta@gmail.com>>
>>> wrote:
>>>
>>>
>>> Oh yeah!!! The test really quizes you on subject
>>> matter. Even though I passed on the first try I wasn't entirely happy
>>> with the experience.
>>>
>>> Sent from my iPhone
>>>
>>> On Sep 19, 2009, at 5:41 PM, Andrea Gatta <
>>> <mailto:andrea.gatta at gmail.com<http://us.mc1102.mail.yahoo.com/mc/compose?to=andrea.gatta@gmail.com>>
>>> andrea.gatta at gmail.com<http://us.mc1102.mail.yahoo.com/mc/compose?to=andrea.gatta@gmail.com>>
>>> wrote:
>>>
>>>
>>>
>>> So I guess I should actually watch out
>>> for these sort of questions in the real exam...
>>>
>>> Andrea
>>>
>>>
>>> On Sun, Sep 20, 2009 at 12:28 AM, Mike
>>> Archuleta < <mailto:mlarchuleta at gmail.com<http://us.mc1102.mail.yahoo.com/mc/compose?to=mlarchuleta@gmail.com>
>>> >
>>> <mailto:mlarchuleta at gmail.com<http://us.mc1102.mail.yahoo.com/mc/compose?to=mlarchuleta@gmail.com>>
>>> mlarchuleta at gmail.com<http://us.mc1102.mail.yahoo.com/mc/compose?to=mlarchuleta@gmail.com>>
>>> wrote:
>>>
>>>
>>> I remember this question. It is
>>> the most correct answer based on wording. After realizing that answer
>>> included placed with autorized users.
>>>
>>> I think I argued with myself for
>>> five minutes. Who places a database near authorized users? I put a
>>> database in the data center with aal my servers and backup systems.
>>>
>>> Sent from my iPhone
>>>
>>> On Sep 19, 2009, at 5:19 PM,
>>> Andrea Gatta < <mailto:andrea.gatta at gmail.com<http://us.mc1102.mail.yahoo.com/mc/compose?to=andrea.gatta@gmail.com>
>>> >
>>> <mailto:andrea.gatta at gmail.com<http://us.mc1102.mail.yahoo.com/mc/compose?to=andrea.gatta@gmail.com>>
>>> andrea.gatta at gmail.com<http://us.mc1102.mail.yahoo.com/mc/compose?to=andrea.gatta@gmail.com>>
>>> wrote:
>>>
>>>
>>>
>>> Well, same here.
>>>
>>> Unfortunately the
>>> question is from the official ISC2 guide, page 747 ;-)
>>>
>>> Point is, any chance
>>> they got it wrong ?
>>>
>>> Andrea
>>>
>>>
>>> On Sun, Sep 20, 2009 at
>>> 12:15 AM, Mike Archuleta < <mailto:mlarchuleta at gmail.com<http://us.mc1102.mail.yahoo.com/mc/compose?to=mlarchuleta@gmail.com>
>>> >
>>> <mailto:mlarchuleta at gmail.com<http://us.mc1102.mail.yahoo.com/mc/compose?to=mlarchuleta@gmail.com>>
>>> <mailto:mlarchuleta at gmail.com<http://us.mc1102.mail.yahoo.com/mc/compose?to=mlarchuleta@gmail.com>
>>> >
>>> mlarchuleta at gmail.com<http://us.mc1102.mail.yahoo.com/mc/compose?to=mlarchuleta@gmail.com>>
>>> wrote:
>>>
>>>
>>> I would think
>>> niether improve or reduce availability. I don't think if crypto as an
>>> availability feature.
>>>
>>> Sent from my
>>> iPhone
>>>
>>>
>>> On Sep 19, 2009,
>>> at 5:06 PM, Andrea Gatta < <mailto:andrea.gatta at gmail.com<http://us.mc1102.mail.yahoo.com/mc/compose?to=andrea.gatta@gmail.com>
>>> >
>>> <mailto:andrea.gatta at gmail.com<http://us.mc1102.mail.yahoo.com/mc/compose?to=andrea.gatta@gmail.com>>
>>> <mailto:andrea.gatta at gmail.com<http://us.mc1102.mail.yahoo.com/mc/compose?to=andrea.gatta@gmail.com>
>>> >
>>> andrea.gatta at gmail.com<http://us.mc1102.mail.yahoo.com/mc/compose?to=andrea.gatta@gmail.com>>
>>> wrote:
>>>
>>>
>>>
>>> Hi
>>> there,
>>> I am
>>> wondering if anyone could shed a light on the following question (and
>>> answer):
>>>
>>> In terms
>>> of databases, cryptography can:
>>>
>>> - only
>>> restrict and reduce availability
>>>
>>> -
>>> improve availability by allowing data to be easily placed where
>>> authorized users can access it
>>>
>>> -
>>> improve availability by increasing the granularity of the access
>>> controls
>>>
>>> -
>>> neither reduce or improve availability
>>>
>>>
>>> As far
>>> as the author of the question is concerned the correct answer is:
>>> "improve availability by allowing data to be easily placed where
>>> authorized users can access it"
>>>
>>> The only
>>> reason I can think of for the answer to have a sense is that
>>> cryptography protects a resource from unauthorized users access through
>>> the mean of concealing its content.
>>>
>>> With a
>>> very long shot one could say that the resource would be "available" just
>>> to authorizaed users. Which means that this question uses "availability"
>>> in a very extensive - and I would add divious - way.
>>>
>>> As far
>>> as I am concerned encryption does provide confidentiality and integrity
>>> as natural security services.
>>>
>>> Thoughts
>>> ?
>>>
>>> Thanks
>>> Andrea
>>>
>>>
>>> _______________________________________________
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>>> ------------------------------
>>>
>>> Message: 2
>>> Date: Mon, 21 Sep 2009 15:37:50 +0100
>>> From: Andrea Gatta <andrea.gatta at gmail.com<http://us.mc1102.mail.yahoo.com/mc/compose?to=andrea.gatta@gmail.com>
>>> >
>>> To: The CISSP Study Mailing list <cisspstudy at cccure.org<http://us.mc1102.mail.yahoo.com/mc/compose?to=cisspstudy@cccure.org>
>>> >
>>> Subject: Re: [Cisspstudy] Databases and cryptography
>>> Message-ID:
>>> <89ab1b610909210737l59ac1349g7f8b6bb6c6076429 at mail.gmail.com<http://us.mc1102.mail.yahoo.com/mc/compose?to=89ab1b610909210737l59ac1349g7f8b6bb6c6076429@mail.gmail.com>
>>> >
>>> Content-Type: text/plain; charset="iso-8859-1"
>>>
>>>
>>> The SANS material seems to be more "inline" with the ISC2 way of
>>> thinking.
>>> At least SANS does mention where you need to just "swollow the peel" and
>>> move on.
>>>
>>> I have personally found a number of clear differences even when it comes
>>> to
>>> things such as encryption methods, systems, types. I can't remember from
>>> the
>>> top of my head but I bet I have found inconsistences between Shon Harris
>>> book and the ISC2 guide.
>>>
>>> The point is, Shon Harris is very good when it comes to drive the concept
>>> home. Clearly the level of trickery of the CISSP exam - if it is true
>>> which
>>> I don't know (yet) - might get in the way.
>>>
>>> Andrea
>>>
>>> On Mon, Sep 21, 2009 at 2:57 PM, Holland, Brandon <hollandb at frmaint.com<http://us.mc1102.mail.yahoo.com/mc/compose?to=hollandb@frmaint.com>
>>> >wrote:
>>>
>>> > You're right, I can't seem to find anything anywhere in there as well.
>>> > I have been studying Shon Harris mainly, but did study some SANS CISSP
>>> > course material as well. I remember having a conversation about
>>> > cryptography and availability with a CISSP (we have multiple) at work.
>>> > The conclusion was confidentiality hinders availability... but that
>>> > must've been wrong. (Or it definitely is for the test.)
>>> >
>>> > It's plain as day in the official guide:
>>> > "Cryptography supports all three of the core principles of information
>>> > security." The concept being by limiting access to only authorized
>>> > individuals you are somehow making the system more available since
>>> > unauthorized users can't get in to destroy the system.
>>> >
>>> > I can see that to some extent... but do you REALLY have to be
>>> authorized
>>> > to break a system? Does a DOS require successful authentication - not
>>> > normally.
>>> >
>>> > I KNOW I read this somewhere with the opposite outcome as the answer
>>> but
>>> > not sure where it came from now.
>>> >
>>> > At least all this talk about it will have me remembering this answer on
>>> > the test, even if I don't agree with it.
>>> >
>>> > Thanks,
>>> > Brandon
>>> >
>>> > -----Original Message-----
>>> > From: cisspstudy-bounces at cccure.org<http://us.mc1102.mail.yahoo.com/mc/compose?to=cisspstudy-bounces@cccure.org>
>>> > [mailto:cisspstudy-bounces at cccure.org<http://us.mc1102.mail.yahoo.com/mc/compose?to=cisspstudy-bounces@cccure.org>]
>>> On Behalf Of Jordan, Lemuel CTR
>>> > Sent: Monday, September 21, 2009 8:26 AM
>>> > To: The CISSP Study Mailing list
>>> > Subject: Re: [Cisspstudy] Databases and cryptography
>>> >
>>> >
>>> > I just scanned through chapter 8 of the Shon Harris Book, and did not
>>> > find
>>> > any discussion on "availability". Do you happen to remember which area
>>> > of
>>> > the book you saw this about cryptography hurting availability.
>>> >
>>> > I plan to take the test in Nov or Dec, things like this make me worry
>>> > also.
>>> >
>>> > Lem
>>> >
>>> >
>>> > -----Original Message-----
>>> > From: cisspstudy-bounces at cccure.org<http://us.mc1102.mail.yahoo.com/mc/compose?to=cisspstudy-bounces@cccure.org>
>>> > [mailto:cisspstudy-bounces at cccure.org<http://us.mc1102.mail.yahoo.com/mc/compose?to=cisspstudy-bounces@cccure.org>
>>> ]
>>> > On Behalf Of Holland, Brandon
>>> > Sent: Monday, September 21, 2009 8:58 AM
>>> > To: The CISSP Study Mailing list
>>> > Subject: Re: [Cisspstudy] Databases and cryptography
>>> >
>>> > That worries me. I plan on taking the test Nov or Dec, and now am
>>> > wondering if I should effectively flush what I've learned from Shon
>>> > Harris and read the ISC2 Official guide for those crazy "just for the
>>> > test" answers like that. I am too lazy to look right now, but am SURE
>>> > that the CISSP Shon Harris book I read says cryptography actually HURTS
>>> > availability... because u are specifically limiting availability by
>>> > obscuring the data. It's like another "hoop" you have to go through
>>> > before having your data available. And if you can't get through it,
>>> > your data is unavailable.
>>> >
>>> > -----Original Message-----
>>> > From: cisspstudy-bounces at cccure.org<http://us.mc1102.mail.yahoo.com/mc/compose?to=cisspstudy-bounces@cccure.org>
>>> > [mailto:cisspstudy-bounces at cccure.org<http://us.mc1102.mail.yahoo.com/mc/compose?to=cisspstudy-bounces@cccure.org>]
>>> On Behalf Of Andrea Gatta
>>> > Sent: Saturday, September 19, 2009 7:27 PM
>>> > To: The CISSP Study Mailing list
>>> > Subject: Re: [Cisspstudy] Databases and cryptography
>>> >
>>> > Well, that is true. But just based on the fact that ISC2 looks very
>>> much
>>> > concerned about keys get lost/corrupted.
>>> >
>>> > On the other hand the last answer - which is sadly the one I picked up
>>> -
>>> > looks quite reasonable.
>>> >
>>> > As a note - looking at the crypto chapter in the ISC2 book it looks
>>> > pretty clear that they consider availability as one one of the security
>>> > services offered by cryptography (page 226). I am sure that
>>> availability
>>> > is not mentioned as a crypto sec service in any other book (but I will
>>> > look into it).
>>> >
>>> > Andrea
>>> >
>>> >
>>> > On Sun, Sep 20, 2009 at 1:15 AM, Mike Archuleta <mlarchuleta at gmail.com<http://us.mc1102.mail.yahoo.com/mc/compose?to=mlarchuleta@gmail.com>
>>> >
>>> > wrote:
>>> >
>>> >
>>> > Well if you follow the chain of thought from the last question.
>>> > If a digruntled employee has access. YES
>>> >
>>> > Sent from my iPhone
>>> >
>>> > On Sep 19, 2009, at 6:01 PM, Andrea Gatta
>>> > <andrea.gatta at gmail.com<http://us.mc1102.mail.yahoo.com/mc/compose?to=andrea.gatta@gmail.com>>
>>> wrote:
>>> >
>>> >
>>> >
>>> > Another thing I have noticed with cryptography is that
>>> > ISC2 tends to riconduct all risks/downsides if cryptography not to
>>> > breach of disclosure as one would thing but instead to (again)
>>> > availability, this time in the technical sense (below one example but I
>>> > am sure I had others):
>>> >
>>> > What is the primary risk of using cryptographic
>>> > protection for systems or data:
>>> >
>>> > - loss of the system means loss of all data
>>> >
>>> > - a hardware failure may lead to lost data or system
>>> > integrity
>>> >
>>> > - a disgruntled user may lead to denial of service
>>> >
>>> > - an employee may may hide is activities from the
>>> > security department
>>> >
>>> > Obviously (now) the third aswer is the correct one
>>> >
>>> > Andrea
>>> >
>>> >
>>> >
>>> >
>>> >
>>> >
>>> > On Sun, Sep 20, 2009 at 12:51 AM, Mike Archuleta <
>>> > <mailto:mlarchuleta at gmail.com<http://us.mc1102.mail.yahoo.com/mc/compose?to=mlarchuleta@gmail.com>>
>>> mlarchuleta at gmail.com<http://us.mc1102.mail.yahoo.com/mc/compose?to=mlarchuleta@gmail.com>>
>>> wrote:
>>> >
>>> >
>>> > Oh yeah!!! The test really quizes you on subject
>>> > matter. Even though I passed on the first try I wasn't entirely happy
>>> > with the experience.
>>> >
>>> > Sent from my iPhone
>>> >
>>> > On Sep 19, 2009, at 5:41 PM, Andrea Gatta <
>>> > <mailto:andrea.gatta at gmail.com<http://us.mc1102.mail.yahoo.com/mc/compose?to=andrea.gatta@gmail.com>>
>>> andrea.gatta at gmail.com<http://us.mc1102.mail.yahoo.com/mc/compose?to=andrea.gatta@gmail.com>>
>>> wrote:
>>> >
>>> >
>>> >
>>> > So I guess I should actually watch out
>>> > for these sort of questions in the real exam...
>>> >
>>> > Andrea
>>> >
>>> >
>>> > On Sun, Sep 20, 2009 at 12:28 AM, Mike
>>> > Archuleta < <mailto:mlarchuleta at gmail.com<http://us.mc1102.mail.yahoo.com/mc/compose?to=mlarchuleta@gmail.com>
>>> >
>>> > <mailto:mlarchuleta at gmail.com<http://us.mc1102.mail.yahoo.com/mc/compose?to=mlarchuleta@gmail.com>>
>>> mlarchuleta at gmail.com<http://us.mc1102.mail.yahoo.com/mc/compose?to=mlarchuleta@gmail.com>>
>>> wrote:
>>> >
>>> >
>>> > I remember this question. It is
>>> > the most correct answer based on wording. After realizing that answer
>>> > included placed with autorized users.
>>> >
>>> > I think I argued with myself for
>>> > five minutes. Who places a database near authorized users? I put a
>>> > database in the data center with aal my servers and backup systems.
>>> >
>>> > Sent from my iPhone
>>> >
>>> > On Sep 19, 2009, at 5:19 PM,
>>> > Andrea Gatta < <mailto:andrea.gatta at gmail.com<http://us.mc1102.mail.yahoo.com/mc/compose?to=andrea.gatta@gmail.com>
>>> >
>>> > <mailto:andrea.gatta at gmail.com<http://us.mc1102.mail.yahoo.com/mc/compose?to=andrea.gatta@gmail.com>>
>>> andrea.gatta at gmail.com<http://us.mc1102.mail.yahoo.com/mc/compose?to=andrea.gatta@gmail.com>>
>>> wrote:
>>> >
>>> >
>>> >
>>> > Well, same here.
>>> >
>>> > Unfortunately the
>>> > question is from the official ISC2 guide, page 747 ;-)
>>> >
>>> > Point is, any chance
>>> > they got it wrong ?
>>> >
>>> > Andrea
>>> >
>>> >
>>> > On Sun, Sep 20, 2009 at
>>> > 12:15 AM, Mike Archuleta < <mailto:mlarchuleta at gmail.com<http://us.mc1102.mail.yahoo.com/mc/compose?to=mlarchuleta@gmail.com>
>>> >
>>> > <mailto:mlarchuleta at gmail.com<http://us.mc1102.mail.yahoo.com/mc/compose?to=mlarchuleta@gmail.com>>
>>> <mailto:mlarchuleta at gmail.com<http://us.mc1102.mail.yahoo.com/mc/compose?to=mlarchuleta@gmail.com>
>>> >
>>> > mlarchuleta at gmail.com<http://us.mc1102.mail.yahoo.com/mc/compose?to=mlarchuleta@gmail.com>>
>>> wrote:
>>> >
>>> >
>>> > I would think
>>> > niether improve or reduce availability. I don't think if crypto as an
>>> > availability feature.
>>> >
>>> > Sent from my
>>> > iPhone
>>> >
>>> >
>>> > On Sep 19, 2009,
>>> > at 5:06 PM, Andrea Gatta < <mailto:andrea.gatta at gmail.com<http://us.mc1102.mail.yahoo.com/mc/compose?to=andrea.gatta@gmail.com>
>>> >
>>> > <mailto:andrea.gatta at gmail.com<http://us.mc1102.mail.yahoo.com/mc/compose?to=andrea.gatta@gmail.com>>
>>> <mailto:andrea.gatta at gmail.com<http://us.mc1102.mail.yahoo.com/mc/compose?to=andrea.gatta@gmail.com>
>>> >
>>> > andrea.gatta at gmail.com<http://us.mc1102.mail.yahoo.com/mc/compose?to=andrea.gatta@gmail.com>>
>>> wrote:
>>> >
>>> >
>>> >
>>> > Hi
>>> > there,
>>> > I am
>>> > wondering if anyone could shed a light on the following question (and
>>> > answer):
>>> >
>>> > In terms
>>> > of databases, cryptography can:
>>> >
>>> > - only
>>> > restrict and reduce availability
>>> >
>>> > -
>>> > improve availability by allowing data to be easily placed where
>>> > authorized users can access it
>>> >
>>> > -
>>> > improve availability by increasing the granularity of the access
>>> > controls
>>> >
>>> > -
>>> > neither reduce or improve availability
>>> >
>>> >
>>> > As far
>>> > as the author of the question is concerned the correct answer is:
>>> > "improve availability by allowing data to be easily placed where
>>> > authorized users can access it"
>>> >
>>> > The only
>>> > reason I can think of for the answer to have a sense is that
>>> > cryptography protects a resource from unauthorized users access through
>>> > the mean of concealing its content.
>>> >
>>> > With a
>>> > very long shot one could say that the resource would be "available"
>>> just
>>> > to authorizaed users. Which means that this question uses
>>> "availability"
>>> > in a very extensive - and I would add divious - way.
>>> >
>>> > As far
>>> > as I am concerned encryption does provide confidentiality and integrity
>>> > as natural security services.
>>> >
>>> > Thoughts
>>> > ?
>>> >
>>> > Thanks
>>> > Andrea
>>> >
>>> >
>>> > _______________________________________________
>>> >
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>>> End of cisspstudy Digest, Vol 15, Issue 29
>>> ******************************************
>>>
>>>
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>>
>>
>> --
>> Sergio Pantoja H.
>> spantoja at gmail.com
>> System, Network and Security Administrator
>> Linux User register #239475
>> Mandrake Club Member
>>
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