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問題 #1641
Which one of the following is a security issue related to aggregation in a database?

A. Partitioning
B. Polyinstantiation
C. Data swapping
D. Inference

答案：D

解題說明：
Inference is the ability of users to infer or deduce information about data at sensitivity levels for which they do not have access privileges. -Ronald Krutz The CISSP PREP Guide (gold edition) pg 358 The other security issue is inference, which is very similar to aggregation. - Shon Harris All-in-one CISSP Certification Guide pg 727 Partitioning a database involves dividing the database into different parts, which makes it much harder for an unauthorized individual to find connecting pieces of data that can be brought together and other information that can be deduced or uncovered. - Shon Harris All-in-one CISSP Certification Guide pg 726 Polyinstantiation- This enables a relation to contain multiple tuples with the same primary keys with each instance distinguished by a security level. - Shon Harris All-in-one CISSP Certification Guide pg 727

問題 #1642
Which of the following BEST ensures the integrity of transactions to intended recipients?

A. Blockchain technology
B. Public key infrastructure (PKI)
C. Pre-shared key (PSK)
D. Web of trust

答案：B

解題說明：
The best option that ensures the integrity of transactions to intended recipients is public key infrastructure (PKI). PKI is a system that provides the services and the mechanisms for creating, managing, distributing, using, storing, and revoking the digital certificates and the public keys that are used for securing the communication and the transactions between the systems or the entities. PKI ensures the integrity of transactions to intended recipients, because it can:
* Verify and authenticate the identity and the validity of the systems or the entities that are involved in the transactions, by using the digital certificates and the public keys, and prevent any impersonation, spoofing, or repudiation of the transactions.
* Encrypt and decrypt the data or the information that are exchanged in the transactions, by using the public keys and the private keys, and prevent any interception, modification, or eavesdropping of the transactions.
* Sign and verify the data or the information that are exchanged in the transactions, by using the digital signatures and the public keys, and ensure that the transactions are not altered, corrupted, or tampered with.
The other options are not the best options that ensure the integrity of transactions to intended recipients.
Blockchain technology is a system that provides a distributed and decentralized ledger or database that records and validates the transactions or the events that are shared and agreed upon by the participants or the nodes in the network, by using the cryptographic hashes and the consensus mechanisms. Blockchain technology can ensure the integrity of transactions to intended recipients, but it is not the best option, because it may not provide the same level of verification, authentication, encryption, decryption, signing, and verification as PKI, and it may have some limitations or challenges, such as the scalability, the performance, or the interoperability of the system. Pre-shared key (PSK) is a system that provides a symmetric encryption or decryption key that is shared or agreed upon by the systems or the entities that are involved in the communication or the transactions, and that is used for securing the communication or the transactions. PSK can ensure the integrity of transactions to intended recipients, but it is not the best option, because it may not provide the same level of verification, authentication, encryption, decryption, signing, and verification as PKI, and it may have some risks or drawbacks, such as the key distribution, the key management, or the key compromise of the system.
Web of trust is a system that provides a decentralized and distributed trust model that relies on the users or the entities to create, validate, and exchange the digital certificates and the public keys that are used for securing the communication or the transactions, by using the endorsements or the ratings of the other users or the entities. Web of trust can ensure the integrity of transactions to intended recipients, but it is not the best option, because it may not provide the same level of verification, authentication, encryption, decryption, signing, and verification as PKI, and it may have some issues or problems, such as the quality, the reliability, or the consistency of the system. References: CISSP All-in-One Exam Guide, Eighth Edition, Chapter 5:
Communication and Network Security, page 633. Official (ISC)2 CISSP CBK Reference, Fifth Edition, Chapter 5: Communication and Network Security, page 634.

問題 #1643
Which of the following is NOT a media viability control used to protect the viability of data storage media?

A. storage
B. clearing
C. marking
D. handling

答案：B

解題說明：
Explanation/Reference:
Explanation:
Clearing is not an example of a media viability control used to protect the viability of data storage media.
Media viability controls are implemented to preserve the proper working state of the media, particularly to facilitate the timely and accurate restoration of the system after a failure.
Many physical controls should be used to protect the viability of the data storage media. The goal is to protect the media from damage during handling and transportation, or during short-term or long-term storage. Proper marking and labeling of the media is required in the event of a system recovery process:
Marking. All data storage media should be accurately marked or labeled. The labels can be used to

identify media with special handling instructions, or to log serial numbers or bar codes for retrieval during a system recovery.
Handling. Proper handling of the media is important. Some issues with the handling of media include

cleanliness of the media and the protection from physical damage to the media during transportation to the archive sites.
Storage. Storage of the media is very important for both security and environmental reasons. A proper

heat- and humidity-free, clean storage environment should be provided for the media. Data media is sensitive to temperature, liquids, magnetism, smoke, and dust.
Incorrect Answers:
B: Marking is a media viability control used to protect the viability of data storage media.
C: Handling is a media viability control used to protect the viability of data storage media.
D: Storage is a media viability control used to protect the viability of data storage media.
References:
Krutz, Ronald L. and Russell Dean Vines, The CISSP Prep Guide: Mastering the CISSP and ISSEP Exams, 2nd Edition, Wiley Publishing, Indianapolis, 2004, p. 324

問題 #1644
Which of the following is the MOST appropriate technique for destroying magnetic platter style hard disk drives (HDD) containing data with a "HIGH" security categorization?

A. Drill through the device and platters.
B. HP iProcess the HDD through a degaussing device.
C. Mechanically shred the entire HDD.
D. Remove the control electronics.

答案：B

問題 #1645
Which is NOT an element of two-factor authentication?

A. Something you have
B. Something you are
C. Something you ate
D. Something you know

答案：C

問題 #1646
......

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