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NEW QUESTION: 1
A. Option B
B. Option D
C. Option C
D. Option A
Answer: D
NEW QUESTION: 2
See the Scenario for additional information.
CruiseAlong Cars
CruiseAlong Cars is a car manufacturing and sales company with corporate headquarters in the United States of America. It has grown by acquisition over the last 20 years and has operations in over 50 countries.
Each country has its own IT organization, with some central corporate IT services provided by the US parent company. In some countries CruiseAlong Cars has outsourced infrastructure and service desks.
The largest IT supplier is Global City IT Services (GCITS). In two countries GCITS provides CruiseAlong Cars with full outsourced services. They also provide selected services in other countries.
Some of the issues that CruiseAlong Cars needs to address include:
Inefficiencies caused by the current IT structure
Inconsistency of IT services when employees are travelling
CruiseAlong Cars is working with a European university (the University of Bachstein) to research and develop driverless car technology. The venture operates as an independent company called DriveYou.com, and CruiseAlong Cars owns a 51% share.
DriveYou.com
This is a small, innovative company, that is jointly owned by CruiseAlong Cars and the University of Bachstein (UoB). DriveYou.com develops custom applications using a highly collaborative, rapid and iterative development approach. Their employees are mostly research and development experts, working from multiple locations, with a significant number working from home. Initial driverless car testing is being conducted in the US at the Nevegon State Department of Transportation.
Infrastructure and cloud services are purchased from Global City IT Services and other providers, and these relationships are managed by a DriveYou.com supplier manager.
Some of the issues that DriveYou.com needs to address include:
Better structure and accountability around their work practices
Compliance with safety and other regulatory requirements.
University of Bachstein (UoB)
The UoB is a university that is based Germany, with a satellite campus in Kuala Lumpur, Malaysia. In the past, some IT services were funded and run centrally, and some were funded and run independently by each faculty. Centrally owned services include a 'walk-in' service desk, plus a separate service desk in the main library, run by library staff. Library services and IT are both part of the university's administrative services division. Recently, under a new CIO, there has been a drive to centralize and consolidate IT as a corporate function, although this has not been fully achieved.
The central IT department runs a variety of legacy systems, which serve students, administrators, researchers and academics. It also runs some high performance computing systems and high bandwidth networks across the main campus area.
Some of the issues that the UoB needs to address include:
Complete the centralization and consolidation of IT
Manage growth and increasing IT demand
Demonstrate value through competitive, responsive and transparent services
Global City Services (GCITS)
GCITS is a global service provider which has grown through acquisition and which offers a wide range of services, including IT support, infrastructure and consulting. GCITS has mature and efficient IT service management processes, and holds an ISO/IEC 20000 certification.
GCITS provides the entire infrastructure and some cloud services for DriveYou.com, as well as a range of services in different countries to CruiseAlong Cars.
Some of the issues that GCITS needs to address include:
Succeed in establishing a strategic partnership with CruiseAlong Cars
Nevagon State Department of Transportation (NSDoT)
NSDot is a government agency in the US state of Nevagon, where DriveYou.com is running their trials. It is responsible for managing transportation systems and safety. DriveYou.com must work with the agency to ensure that their trials comply with safety regulations, and the program includes bi0directional sharing of large amounts of data.
The NSDoT's internal IT team writes and manages most of their agency-specific applications, however most other applications and infrastructure are provided by the Nevagon State central IT department.
GCITS will create a new 'global mobile VIP service' for CruiseAlong Cars senior executives, which will give them access to corporate IT services from mobile devices, from any location. The new service will be delivered by the existing GCITS centralized service desk. It will include 24/7 support, and reported incidents and requests will be treated as a high priority.
GCITS has subcontracted global mobile network access to Mobilwork, an international telecom provider.
During the 'how do we get there? Step, a plan will be created for implementing changes to the service desk procedures. Some issues with the service desk staff are anticipated.
Which OCM activity is the BEST to address the relevant service desk issue?
A. Service desk issue: Resistance to using new procedures
OCM activity: Invite users to share success stories
B. Service desk issue: Lack of training for the new service and procedures OCM activity: Implement a staff reward scheme
C. Service desk issue: Inconsistent engagement in the project
OCM activity: Create a plan for regular measurement and reporting
D. Service desk issue: Poorly defined roles and responsibilities for the new procedures OCM activity: Conduct a training needs analysis
Answer: C
NEW QUESTION: 3
Which of the following cryptographic attacks describes when the attacker has a copy of the plaintext and the corresponding ciphertext?
A. ciphertext only
B. chosen plaintext
C. known plaintext
D. brute force
Answer: C
Explanation:
The goal to this type of attack is to find the cryptographic key that was used to encrypt the message. Once the key has been found, the attacker would then be able to decrypt all messages that had been encrypted using that key.
The known-plaintext attack (KPA) or crib is an attack model for cryptanalysis where the attacker has samples of both the plaintext and its encrypted version (ciphertext), and is at liberty to make use of them to reveal further secret information such as secret keys and code books. The term "crib" originated at Bletchley Park, the British World War II decryption operation
In cryptography, a brute force attack or exhaustive key search is a strategy that can in theory be used against any encrypted data by an attacker who is unable to take advantage of any weakness in an encryption system that would otherwise make his task easier. It involves systematically checking all possible keys until the correct key is found. In the worst case, this would involve traversing the entire key space, also called search space.
In cryptography, a ciphertext-only attack (COA) or known ciphertext attack is an attack model for cryptanalysis where the attacker is assumed to have access only to a set of ciphertexts.
The attack is completely successful if the corresponding plaintexts can be deduced, or even better, the key. The ability to obtain any information at all about the underlying plaintext is still considered a success. For example, if an adversary is sending ciphertext continuously to maintain traffic-flow security, it would be very useful to be able to distinguish real messages from nulls. Even making an informed guess of the existence of real messages would facilitate traffic analysis.
In the history of cryptography, early ciphers, implemented using pen-and-paper, were routinely broken using ciphertexts alone. Cryptographers developed statistical techniques for attacking ciphertext, such as frequency analysis. Mechanical encryption devices such as Enigma made these attacks much more difficult (although, historically, Polish cryptographers were able to mount a successful ciphertext-only cryptanalysis of the Enigma by exploiting an insecure protocol for indicating the message settings).
Every modern cipher attempts to provide protection against ciphertext-only attacks. The vetting process for a new cipher design standard usually takes many years and includes exhaustive testing of large quantities of ciphertext for any statistical departure from random noise. See: Advanced Encryption Standard process. Also, the field of steganography evolved, in part, to develop methods like mimic functions that allow one piece of data to adopt the statistical profile of another. Nonetheless poor cipher usage or reliance on homegrown proprietary algorithms that have not been subject to thorough scrutiny has resulted in many computer-age encryption systems that are still subject to ciphertext-only attack. Examples include:
Early versions of Microsoft's PPTP virtual private network software used the same RC4 key for the sender and the receiver (later versions had other problems). In any case where a stream cipher like RC4 is used twice with the same key it is open to ciphertext-only attack. See: stream cipher attack Wired Equivalent Privacy (WEP), the first security protocol for Wi-Fi, proved vulnerable to several attacks, most of them ciphertext-only.
A chosen-plaintext attack (CPA) is an attack model for cryptanalysis which presumes that the attacker has the capability to choose arbitrary plaintexts to be encrypted and obtain the corresponding ciphertexts. The goal of the attack is to gain some further information which reduces the security of the encryption scheme. In the worst case, a chosen-plaintext attack could reveal the scheme's secret key.
This appears, at first glance, to be an unrealistic model; it would certainly be unlikely that an attacker could persuade a human cryptographer to encrypt large amounts of plaintexts of the attacker's choosing. Modern cryptography, on the other hand, is implemented in software or hardware and is used for a diverse range of applications; for many cases, a chosen-plaintext attack is often very feasible. Chosen-plaintext attacks become extremely important in the context of public key cryptography, where the encryption key is public and attackers can encrypt any plaintext they choose.
Any cipher that can prevent chosen-plaintext attacks is then also guaranteed to be secure against known-plaintext and ciphertext-only attacks; this is a conservative approach to security.
Two forms of chosen-plaintext attack can be distinguished:
Batch chosen-plaintext attack, where the cryptanalyst chooses all plaintexts before any of them are encrypted. This is often the meaning of an unqualified use of "chosen-plaintext attack".
Adaptive chosen-plaintext attack, where the cryptanalyst makes a series of interactive queries, choosing subsequent plaintexts based on the information from the previous encryptions.
References:
Source: TIPTON, Harold, Official (ISC)2 Guide to the CISSP CBK (2007), page 271. and Wikipedia at the following links: http://en.wikipedia.org/wiki/Chosen-plaintext_attack http://en.wikipedia.org/wiki/Known-plaintext_attack http://en.wikipedia.org/wiki/Ciphertext-only_attack http://en.wikipedia.org/wiki/Brute_force_attack
NEW QUESTION: 4
Huawei's distributed virtual switching supports the function of pure software virtual switching based on open source Open vSwtch, and provides virtual switching of smart network cards that support complete virtual switching offloading.
A. False
B. True
Answer: B