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Certification Topics of ISC CISSP Exam
Topics of ISC CISSP Certification Exam described in CISSP Dumps:
- Security Operations
- Identity and Access Management (IAM)
- Asset Security Architecture and Engineering
- Security Assessment and Testing
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ISC Certified Information Systems Security Professional Sample Questions (Q328-Q333):
NEW QUESTION # 328
Which reporting type requires a service organization to describe its system and define its control objectives and controls that are relevant to users internal control over financial reporting?
- A. Service Organization Control 2 (SOC2)
- B. Service Organization Control 1 (SOC1)
- C. Statement on Auditing Standards (SAS)70
- D. Service Organization Control 3 (SOC3)
Answer: B
NEW QUESTION # 329
Which of the following can be best defined as computing techniques for inseparably embedding unobtrusive marks or labels as bits in digital data and for detecting or extracting the marks later?
- A. Digital signature
- B. Digital watermarking
- C. Steganography
- D. Digital enveloping
Answer: B
Explanation:
RFC 2828 (Internet Security Glossary) defines digital watermarking as computing techniques for inseparably embedding unobtrusive marks or labels as bits in digital data-text, graphics, images, video, or audio#and for detecting or extracting the marks later. The set of embedded bits (the digital watermark) is sometimes hidden, usually imperceptible, and always intended to be unobtrusive. It is used as a measure to protect intellectual property rights. Steganography involves hiding the very existence of a message. A digital signature is a value computed with a cryptographic algorithm and appended to a data object in such a way that any recipient of the data can use the signature to verify the data's origin and integrity. A digital envelope is a combination of encrypted data and its encryption key in an encrypted form that has been prepared for use of the recipient.
Source: SHIREY, Robert W., RFC2828: Internet Security Glossary, may 2000.
NEW QUESTION # 330
In a PKI infrastructure where are list of revoked certificates stored?
- A. CRL
- B. Recovery Agent
- C. Key escrow
- D. Registration Authority
Answer: A
Explanation:
Certificate revocation is the process of revoking a certificate before it expires.
A certificate may need to be revoked because it was stolen, an employee moved to a new
company, or someone has had their access revoked. A certificate revocation is handled either
through a Certificate Revocation List (CRL) or by using the Online Certificate Status Protocol
(OCSP).
A repository is simply a database or database server where the certificates are stored. The
process of revoking a certificate begins when the CA is notified that a particular certificate needs
to be revoked. This must be done whenever the private key becomes known/compromised.
The owner of a certificate can request it be revoked at any time, or the request can be made by
the administrator. The CA marks the certificate as revoked. This information is published in the
CRL. The revocation process is usually very quick; time is based on the publication interval for the
CRL.
Disseminating the revocation information to users may take longer. Once the certificate has been
revoked, it can never be used-or trusted-again. The CA publishes the CRL on a regular basis,
usually either hourly or daily. The CA sends or publishes this list to organizations that have chosen
to receive it; the publishing process occurs automatically in the case of PKI. The time between
when the CRL is issued and when it reaches users may be too long for some applications. This
time gap is referred to as latency.
OCSP solves the latency problem: If the recipient or relaying party uses OCSP for verification, the
answer is available immediately.
The following answers are incorrect:
Registration Authority (RA) A registration authority (RA) is an authority in a network that verifies user requests for a digital certificate and tells the certificate authority (CA) to issue it. RAs are part of a public key infrastructure (PKI), a networked system that enables companies and users to exchange information and money safely and securely. The digital certificate contains a public key that is used to encrypt and decrypt messages and digital signatures.
Recovery agent Sometimes it is necessary to recover a lost key. One of the problems that often arises regarding PKI is the fear that documents will become lost forever-irrecoverable because someone loses or forgets his private key. Let's say that employees use Smart Cards to hold their private keys. If a user was to leave his Smart Card in his or her wallet that was left in the pants that he or she accidentally threw into the washing machine, then that user might be without his private key and therefore incapable of accessing any documents or e-mails that used his existing private key.
Many corporate environments implement a key recovery server solely for the purpose of backing up and recovering keys. Within an organization, there typically is at least one key recovery agent. A key recovery agent has the authority and capability to restore a user's lost private key. Some key recovery servers require that two key recovery agents retrieve private user keys together for added security. This is similar to certain bank accounts, which require two signatures on a check for added security. Some key recovery servers also have the ability to function as a key escrow server, thereby adding the ability to split the keys onto two separate recovery servers, further increasing security.
Key escrow (also known as a "fair" cryptosystem) is an arrangement in which the keys needed to decrypt encrypted data are held in escrow so that, under certain circumstances, an authorized third party may gain access to those keys. These third parties may include businesses, who may want access to employees' private communications, or governments, who may wish to be able to view the contents of encrypted communications.
The following reference(s) were/was used to create this question: Dulaney, Emmett (2011-06-03). CompTIA Security+ Study Guide: Exam SY0-301 (pp. 347-348). John Wiley and Sons. Kindle Edition. and http://en.wikipedia.org/wiki/Key_escrow and http://my.safaribooksonline.com/book/certification/securityplus/9781597494267/public-key
infrastructure/ch12lev1sec5 and http://searchsecurity.techtarget.com/definition/registration-authority
NEW QUESTION # 331
What is a limitation of TCP Wrappers?
- A. It stops packets before they reach the application layer, thus confusing some proxy servers.
- B. It cannot control access to running UDP services.
- C. They are too expensive.
- D. The hosts.* access control system requires a complicated directory tree.
Answer: B
Explanation:
TCP Wrappers can control when a UDP server starts but has little control afterwards because UDP packets can be sent randomly.
The following answers are incorrect:
It stops packets before they reach the application layer, thus confusing some proxy servers. Is incorrect because the TCP Wrapper acts as an ACL restricting packets so would not confuse a proxy server because the packets would not arrive and would not be a limitation.
The hosts.* access control system requires a complicated directory tree. Is incorrect because a simple directory tree is involved.
They are too expensive. Is incorrect because TCP Wrapper is considered open source with a BSD licensing scheme.
NEW QUESTION # 332
What attack involves repeatedly sending identical e-message to a particular address?
- A. Spamming
- B. Brute force
- C. SMURF
- D. Teardrop
Answer: A
Explanation:
Spamming -- Involves repeatedly sending identical e-message to a particular address. It is a variant of bombing, and is made worse when the recipient replies -- i.e. recent cases where viruses or worms were attached to the e-mail message and ran a program that forwarded the message from the reader to any one on the user's distribution lists. This attack cannot be prevented, but you should ensure that entrance and exit of such mail is only through central mail hubs.
NEW QUESTION # 333
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