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Download System Security Certified Practitioner (SSCP) Exam Dumps
NEW QUESTION 44
The general philosophy for DMZ's is that:
- A. any system on the DMZ cannot be compromized because it's by definition 100 percent safe and not accessible from the Internet.
- B. some systems on the DMZ can be compromized because they are accessible from the Internet.
- C. any system on the DMZ can be compromized because it's accessible from the Internet.
- D. any system on the DMZ cannot be compromized because it's not accessible from the Internet.
Answer: C
Explanation:
Because the DMZ systems are accessible from the Internet, they are more at risk for attacka nd compromise and must be hardened appropriately.
"Any system on the DMZ cannot be compromised because it's not accessible from the Internet" is incorrect. The reason a system is placed in the DMZ is so it can be accessible from the Internet.
"Some systems on the DMZ can be compromised because they are accessible from the Internet" is incorrect. All systems in the DMZ face an increased risk of attack and compromise because they are accessible from the Internet.
"Any system on the DMZ cannot be compromised because it's by definition 100 percent safe and not accessible from the Internet" is incorrect. Again, a system is placed in the DMZ because it must be accessible from the Internet.
References:
CBK, p. 434 AIO3, p. 483
NEW QUESTION 45
An area of the Telecommunications and Network Security domain that directly affects the Information Systems Security tenet of Availability can be defined as:
- A. Netware availability
- B. Network accountability
- C. Network acceptability
- D. Network availability
Answer: D
Explanation:
Section: Security Operation Adimnistration
Explanation/Reference:
Network availability can be defined as an area of the Telecommunications and Network Security domain that directly affects the Information Systems Security tenet of Availability.
Source: KRUTZ, Ronald L. & VINES, Russel D., The CISSP Prep Guide: Mastering the Ten Domains of Computer Security, 2001, John Wiley & Sons, Page 64.
NEW QUESTION 46
What is Kerberos?
- A. A remote authentication dial in user server.
- B. A three-headed dog from the egyptian mythology.
- C. A security model.
- D. A trusted third-party authentication protocol.
Answer: D
Explanation:
Section: Access Control
Explanation
Explanation/Reference:
Is correct because that is exactly what Kerberos is.
The following answers are incorrect:
A three-headed dog from Egyptian mythology. Is incorrect because we are dealing with Information Security and not the Egyptian mythology but the Greek Mythology.
A security model. Is incorrect because Kerberos is an authentication protocol and not just a security model.
A remote authentication dial in user server. Is incorrect because Kerberos is not a remote authentication dial in user server that would be called RADIUS.
NEW QUESTION 47
Cryptography does not concern itself with which of the following choices?
- A. Validation
- B. Confidentiality
- C. Integrity
- D. Availability
Answer: A
Explanation:
Explanation/Reference:
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 completely support the standard of availability.
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 of passwords. Many token-based authentication systems use cryptographic-based hash algorithms to compute one-time passwords.
Denying unauthorized access prevents an attacker from entering and damaging the system or network, thereby denying access to authorized users if they damage or currupt the data.
Confidentiality
Cryptography provides confidentiality through altering or hiding a message so that ideally it cannot be understood by anyone except the intended recipient.
Integrity
Cryptographic tools provide integrity checks that allow a recipient to verify that a message has not been altered. Cryptographic tools cannot prevent a message from being altered, but they are effective to detect either intentional or accidental modification of the message.
Additional Features of Cryptographic Systems In addition to the three core principles of information security listed above, cryptographic tools provide several more benefits.
Nonrepudiation
In a trusted environment, the authentication of the origin can be provided through the simple control of the keys. The receiver has a level of assurance that the message was encrypted by the sender, and the sender has trust that the message was not altered once it was received. However, in a more stringent, less trustworthy environment, it may be necessary to provide assurance via a third party of who sent a message and that the message was indeed delivered to the right recipient. This is accomplished through the use of digital signatures and public key encryption. The use of these tools provides a level of nonrepudiation of origin that can be verified by a third party.
Once a message has been received, what is to prevent the recipient from changing the message and contesting that the altered message was the one sent by the sender? The nonrepudiation of delivery prevents a recipient from changing the message and falsely claiming that the message is in its original state. This is also accomplished through the use of public key cryptography and digital signatures and is verifiable by a trusted third party.
Authentication
Authentication is the ability to determine if someone or something is what it declares to be. This is primarily done through the control of the keys, because only those with access to the key are able to encrypt a message. This is not as strong as the nonrepudiation of origin, which will be reviewed shortly Cryptographic functions use several methods to ensure that a message has not been changed or altered.
These include hash functions, digital signatures, and message authentication codes (MACs). The main concept is that the recipient is able to detect any change that has been made to a message, whether accidentally or intentionally.
Access Control
Through the use of cryptographic tools, many forms of access control are supported-from log-ins via passwords and passphrases to the prevention of access to confidential files or messages. In all cases, access would only be possible for those individuals that had access to the correct cryptographic keys.
NOTE FROM CLEMENT:
As you have seen this question was very recently updated with the latest content of the Official ISC2 Guide (OIG) to the CISSP CBK, Version 3.
Myself, I agree with most of you that cryptography does not help on the availability side and it is even the contrary sometimes if you loose the key for example. In such case you would loose access to the data and negatively impact availability. But the ISC2 is not about what I think or what you think, they have their own view of the world where they claim and state clearly that cryptography does address availability even thou it does not fully address it.
They look at crypto as the ever emcompassing tool it has become today. Where it can be use for authentication purpose for example where it would help to avoid corruption of the data through illegal access by an unauthorized user.
The question is worded this way in purpose, it is VERY specific to the CISSP exam context where ISC2 preaches that cryptography address availability even thou they state it does not fully address it. This is something new in the last edition of their book and something you must be aware of.
Best regards
Clement
The following terms are from the Software Development Security domain:
Validation: The assurance that a product, service, or system meets the needs of the customer and other identified stakeholders. It often involves acceptance and suitability with external customers. Contrast with verification below."
Verification: The evaluation of whether or not a product, service, or system complies with a regulation, requirement, specification, or imposed condition. It is often an internal process. Contrast with validation." The terms above are from the Software Development Security Domain.
Reference(s) used for this question:
Schneiter, Andrew (2013-04-15). Official (ISC)2 Guide to the CISSP CBK, Third Edition : Cryptography (Kindle Locations 227-244). . Kindle Edition.
and
Schneiter, Andrew (2013-04-15). Official (ISC)2 Guide to the CISSP CBK, Third Edition : Cryptography (Kindle Locations 206-227). . Kindle Edition.
and
http://en.wikipedia.org/wiki/Verification_and_validation
NEW QUESTION 48
Which of the following is the act of performing tests and evaluations to test a system's security level to see if it complies with the design specifications and security requirements?
- A. Validation
- B. Accuracy
- C. Verification
- D. Assessment
Answer: C
Explanation:
Verification vs. Validation:
Verification determines if the product accurately represents and meets the specifications. A product can be developed that does not match the original specifications. This step ensures that the specifications are properly met.
Validation determines if the product provides the necessary solution intended real-world problem. In large projects, it is easy to lose sight of overall goal. This exercise ensures that the main goal of the project is met.
From DITSCAP:
6.3.2. Phase 2, Verification. The Verification phase shall include activities to verify compliance of the system with previously agreed security requirements. For each life-cycle development activity, DoD Directive 5000.1 (reference (i)), there is a corresponding set of security activities, enclosure 3, that shall verify compliance with the security requirements and evaluate vulnerabilities.
6.3.3. Phase 3, Validation. The Validation phase shall include activities to evaluate the fully integrated system to validate system operation in a specified computing environment with an acceptable level of residual risk. Validation shall culminate in an approval to operate.
You must also be familiar with Verification and Validation for the purpose of the exam. A simple definition for Verification would be whether or not the developers followed the design specifications along with the security requirements. A simple definition for Validation would be whether or not the final product meets the end user needs and can be use for a specific purpose.
Wikipedia has an informal description that is currently written as: Validation can be expressed by the query "Are you building the right thing?" and Verification by "Are you building it right?
NOTE: DITSCAP was replaced by DIACAP some time ago (2007). While DITSCAP had defined both a verification and a validation phase, the DIACAP only has a validation phase. It may not make a difference in the answer for the exam; however, DIACAP is the cornerstone policy of DOD C&A and IA efforts today. Be familiar with both terms just in case all of a sudden the exam becomes updated with the new term.
Reference(s) used for this question:
Harris, Shon (2012-10-18). CISSP All-in-One Exam Guide, 6th Edition (p. 1106). McGraw-Hill. Kindle Edition.
http://iase.disa.mil/ditscap/DITSCAP.html https://en.wikipedia.org/wiki/Verification_and_validation For the definition of "validation" in DIACAP, Click Here Further sources for the phases in DIACAP, Click Here
NEW QUESTION 49
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