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NEW QUESTION: 1
안전하지 않은 제품을 생산 및 판매하는 데 1 억 달러의 소송이 제기되었습니다.
기업 변호사는 소송 결과를 확실하게 예측할 수 없습니다. 재무 제표에서 기업은 다음을 수행해야 한다.
A. 저널 항목을 작성하지 않고 메모에 소송의 존재를 공개합니다.
B. 나쁜 홍보는 실체에 해를 끼칠 수 있기 때문에 저널에 기재하거나 소송을 공개하지 마십시오.
C. 다음 분개를 작성하고 소송의 존재를 메모에 공개하십시오. 소송에서 예상 손실 US $ 100,000,000 소송에서 손실 예상 추정 US $ 100,000,000
D. 다음 분개를 작성하고 소송의 존재를 메모에 공개하십시오. 재화 판매 비용 $ 100,000,000 소송 손실 예상 비용 US $ 100,000,000
Answer: A
Explanation:
In the very rare case in which a reliable estimate of an obligation that otherwise qualifies for treatment as a provision cannot be determined, no liability is recognized. Instead, the existing liability is disclosed as a contingent liability unless the possibility of any outflow in settlement is remote).
NEW QUESTION: 2
What is the result of the following bucket policy?
Choose the correct answer:
Please select:
A. It will allow the user mark from AWS account number 111111111 all access to the bucket but deny everyone else all access to the bucket
B. None of these
C. It will allow all access to the bucket mybucket
D. It will deny all access to the bucket mybucket
Answer: D
Explanation:
The policy consists of 2 statements, one is the allow for the user mark to the bucket and the next is the deny policy for all other users. The deny permission will override the allow and hence all users will not have access to the bucket.
Options A,B and D are all invalid because this policy is used to deny all access to the bucket mybucket For examples on S3 bucket policies, please refer to the below Link:
http://docs.aws.amazon.com/AmazonS3/latest/dev/example-bucket-policies.htmll The correct answer is: It will deny all access to the bucket mybucket Submit your FeedbacK/Quenes to our Experts
NEW QUESTION: 3
You have been approached by one of your clients . They are interested in doing some security re-engineering . The client is looking at various information security models. It is a highly secure environment where data at high classifications cannot be leaked to subjects at lower classifications . Of primary concern to them, is the identification of potential covert channel. As an Information Security Professional , which model would you recommend to the client?
A. Information Flow Model
B. Information Flow Model combined with Bell Lapadula
C. Biba
D. Bell Lapadula
Answer: B
Explanation:
Securing the data manipulated by computing systems has been a challenge in the past years. Several methods to limit the information disclosure exist today, such as access control lists, firewalls, and cryptography. However, although these methods do impose limits on the information that is released by a system, they provide no guarantees about information propagation. For example, access control lists of file systems prevent unauthorized file access, but they do not control how the data is used afterwards. Similarly, cryptography provides a means to exchange information privately across a non-secure channel, but no guarantees about the confidentiality of the data are given once it is decrypted. In low level information flow analysis, each variable is usually assigned a security level. The basic model comprises two distinct levels: low and high, meaning, respectively, publicly observable information, and secret information. To ensure confidentiality, flowing information from high to low variables should not be allowed. On the other hand, to ensure integrity, flows to high variables should be restricted. More generally, the security levels can be viewed as a lattice with information flowing only upwards in the lattice.
Noninterference Models This could have been another good answer as it would help in minimizing the damage from covert channels. The goal of a noninterference model is to help ensure that high-level actions (inputs) do not determine what low-level user s can see (outputs ) . Most of the security models presented are secured by permitting restricted ows between high- and low-level users. The noninterference model maintains activities at different security levels to separate these levels from each other. In this way, it minimizes leakages that may happen through covert channels, because there is complete separation (noninterference) between security levels. Because a user at a higher security level has no way to interfere with the activities at a lower level, the lower-level user cannot get any information from the higher leve.
The following answers are incorrect: Bell Lapadula The Bell-LaPadula Model (abbreviated BLP) is a state machine model used for enforcing access control in government and military applications. It was developed by David Elliott Bell and Leonard
J. LaPadula, subsequent to strong guidance from Roger R. Schell to formalize the U.S. Department of Defense (DoD) multilevel security (MLS) policy. The model is a formal state transition model of computer security policy that describes a set of access control rules which use security labels on objects and clearances for subjects. Security labels range from the most sensitive (e.g."Top Secret"), down to the least sensitive (e.g., "Unclassified" or "Public").
The Bell-LaPadula model focuses on data confidentiality and controlled access to classified
information, in contrast to the Biba Integrity Model which describes rules for the protection of data
integrity. In this formal model, the entities in an information system are divided into subjects and
objects. The notion of a "secure state" is defined, and it is proven that each state transition
preserves security by moving from secure state to secure state, thereby inductively proving that
the system satisfies the security objectives of the model. The Bell-LaPadula model is built on the
concept of a state machine with a set of allowable states in a computer network system. The
transition from one state to another state is defined by transition functions.
A system state is defined to be "secure" if the only permitted access modes of subjects to objects
are in accordance with a security policy. To determine whether a specific access mode is allowed,
the clearance of a subject is compared to the classification of the object (more precisely, to the
combination of classification and set of compartments, making up the security level) to determine if
the subject is authorized for the specific access mode. The clearance/classification scheme is
expressed in terms of a lattice. The model defines two mandatory access control (MAC) rules and
one discretionary access control (DAC) rule with three security properties:
The Simple Security Property - a subject at a given security level may not read an object at a
higher security level (no read-up).
The -property (read "star"-property) - a subject at a given security level must not write to any
object at a lower security level (no write-down). The -property is also known as the Confinement
property.
The Discretionary Security Property - use of an access matrix to specify the discretionary access
control.
The transfer of information from a high-sensitivity document to a lower-sensitivity document may
happen in the Bell-LaPadula model via the concept of trusted subjects. Trusted Subjects are not
restricted by the -property. Untrusted subjects are. Trusted Subjects must be shown to be
trustworthy with regard to the security policy. This security model is directed toward access control
and is characterized by the phrase: "no read up, no write down."
With Bell-LaPadula, users can create content only at or above their own security level (i.e. secret
researchers can create secret or top-secret files but may not create public files; no write-down).
Conversely, users can view content only at or below their own security level (i.e. secret
researchers can view public or secret files, but may not view top-secret files; no read-up).
The Bell-LaPadula model explicitly defined its scope. It did not treat the following extensively:
Covert channels. Passing information via pre-arranged actions was described briefly.
Networks of systems. Later modeling work did address this topic.
Policies outside multilevel security. Work in the early 1990s showed that MLS is one version of
boolean policies, as are all other published policies.
Biba
The Biba Model or Biba Integrity Model developed by Kenneth J. Biba in 1977, is a formal state
transition system of computer security policy that describes a set of access control rules designed
to ensure data integrity. Data and subjects are grouped into ordered levels of integrity. The model
is designed so that subjects may not corrupt objects in a level ranked higher than the subject, or
be corrupted by objects from a lower level than the subject.
In general the model was developed to circumvent a weakness in the Bell-LaPadula model which
only addresses data confidentiality.
In general, preservation of data integrity has three goals:
Prevent data modification by unauthorized parties
Prevent unauthorized data modification by authorized parties
Maintain internal and external consistency (i.e. data reflects the real world)
Note: Biba address only the first goal of integrity while Clark-Wilson addresses all three
This security model is directed toward data integrity (rather than confidentiality) and is
characterized by the phrase: "no read down, no write up". This is in contrast to the Bell-LaPadula
model which is characterized by the phrase "no write down, no read up".
In the Biba model, users can only create content at or below their own integrity level (a monk may
write a prayer book that can be read by commoners, but not one to be read by a high priest).
Conversely, users can only view content at or above their own integrity level (a monk may read a
book written by the high priest, but may not read a pamphlet written by a lowly commoner).
Another analogy to consider is that of the military chain of command. A General may write orders
to a Colonel, who can issue these orders to a Major. In this fashion, the General's original orders
are kept intact and the mission of the military is protected (thus, "no read down" integrity).
Conversely, a Private can never issue orders to his Sergeant, who may never issue orders to a
Lieutenant, also protecting the integrity of the mission ("no write up").
The Biba model defines a set of security rules similar to the Bell-LaPadula model. These rules are
the reverse of the Bell-LaPadula rules:
The Simple Integrity Axiom states that a subject at a given level of integrity must not read an
object at a lower integrity level (no read down).
The * (star) Integrity Axiom states that a subject at a given level of integrity must not write to any
object at a higher level of integrity (no write up).
Lattice Model
In computer security, lattice-based access control (LBAC) is a complex access control model
based on the interaction between any combination of objects (such as resources, computers, and
applications) and subjects (such as individuals, groups or organizations).
In this type of label-based mandatory access control model, a lattice is used to define the levels of
security that an object may have and that a subject may have access to. The subject is only
allowed to access an object if the security level of the subject is greater than or equal to that of the
object. Mathematically, the security level access may also be expressed in terms of the lattice (a partial order set) where each object and subject have a greatest lower bound (meet) and least upper bound (join) of access rights. For example, if two subjects A and B need access to an object, the security level is defined as the meet of the levels of A and B. In another example, if two objects X and Y are combined, they form another object Z, which is assigned the security level formed by the join of the levels of X and Y.
The following reference(s) were/was used to create this question: ISC2 Review Seminar Student Manual V800 page 255 Dorothy Denning developed the information flow model to address convert channels . and The ISC2 Official Study Guide, Second Edition, on page 683-685 and https://secure.wikimedia.org/wikipedia/en/wiki/Biba_security_model and https://secure.wikimedia.org/wikipedia/en/wiki/Bell%E2%80%93LaPadula_model and https://secure.wikimedia.org/wikipedia/en/wiki/Lattice-based_access_control
NEW QUESTION: 4
What are three benefits of GLBP? (Choose three.)
A. GLBP supports clear text and MD5 password authentication between GLBP group members.
B. GLBP supports up to eight virtual forwarders per GLBP group.
C. GLBP supports up to 1024 virtual routers.
D. GLBP can load share traffic across a maximum of four routers.
E. GLBP is an open source standardized protocol that can be used with multiple vendors.
F. GLBP elects two AVGs and two standby AVGs for redundancy.
Answer: A,C,D
Explanation:
Explanation/Reference:
Redundancy Protocols - Part 5 (GLBP)
Reference 1:
http://www.cisco.com/en/US/docs/ios/12_2s/feature/guide/fs_glbp2.html
Explanation:
Load Sharing
You can configure GLBP in such a way that traffic from LAN clients can be shared by multiple routers, thereby sharing the traffic load more equitably among available routers.
Multiple Virtual Routers
GLBP supports up to 1024 virtual routers (GLBP groups) on each physical interface of a router, and up to four virtual forwarders per group.
Preemption
The redundancy scheme of GLBP enables you to preempt an active virtual gateway with a higher priority backup virtual gateway that has become available. Forwarder preemption works in a similar way, except that forwarder preemption uses weighting instead of priority and is enabled by default.
Authentication
You can use a simple text password authentication scheme between GLBP group members to detect configuration errors. A router within a GLBP group with a different authentication string than other routers will be ignored by other group members.
Reference 2:
http://www.cisco.com/en/US/docs/switches/datacenter/sw/5_x/nx-os/unicast/configuration/guide/ l3_glbp.html
Explanation:
GLBP Authentication
GLBP has three authentication types:
MD5 authentication
Plain text authentication
No authentication
MD5 authentication provides greater security than plain text authentication. MD5 authentication allows each GLBP group member to use a secret key to generate a keyed MD5 hash that is part of the outgoing packet. At the receiving end, a keyed hash of an incoming packet is generated. If the hash within the incoming packet does not match the generated hash, the packet is ignored. The key for the MD5 hash can either be given directly in the configuration using a key string or supplied indirectly through a key chain.
You can also choose to use a simple password in plain text to authenticate GLBP packets, or choose no authentication for GLBP.
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