COCO SOLUTIONS ACADEMIC STORE

Which part of a simple cryptographic system must be kept secret? A) The cipher B) The ciphertext C) The key D) All of the above - Answer C True or false? Cryptography is about keeping things secret so they cannot be used as the basis of a non-repudiation system. - Answer False (Usages are not exclusive) What is confusion? (Choose all that apply) A) The predictable features of the plaintext should not be evident in the ciphertext B) The key should not be derivable from the ciphe...

What does a frequency analysis attack to break encryption involve? - Answer Analyzing cipher- text to identify text variation and comparing the text to standard English characters Which technique should a security analyst use to determine the key length in a Vigenère cipher? - Answer Frequency analysis What is 29 mod 12? (Mod means remainder) - Answer 5 What defines a prime number? - Answer Only has factors of itself and 1 Which type of cipher is ChaCha? - Answer Stre...

Cryptography - Answer Scrambling data so it can not be read Encryption - Answer Changing original text into secret message Decryption - Answer Change secret message back to original Cleartext - Answer Unencrypted data Plaintext - Answer Data in cleartext that is to BE encrypted Algorithms - Answer Procedures based on a Mathematical formula used to encrypted and decrypt the data Cryptography provides 5 basic protections - Answer Confidentiality, Integrity, a...

After the DES cipher was broken and no longer considered secure, what encryption algorithm was made as its successor? A. AES B. Twofish C. 3DES D. RSA - Answer C. 3DES Data that is in an unencrypted form is referred to as which of the following? A. crypt text B. plain text C. simple text D. cleartext - Answer D. cleartext If Bob receives an encrypted reply message from Alice, whose private key is used to decrypt the received message? A. Bob's private key. B. Alice's p...

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Resources to manage - Answer Primary memory Secondary storage Processor speed Bandwidth Screen resolution Sound processor Graphics processor Network connectivity Primary memory - Answer Where all data/programs currently being processed are kept Effect when primary memory is too limited - Answer Need to use secondary memory = slower Virtual memory problem = can't load data Secondary storage - Answer permanent storage memory not directly connected to the processo...

Block-Arrow Diagram - Answer a flowchart using geometric figures to show the data flow in the computer system Sub-Procedure - Answer a section of a computer program that is stored only once but can be used when required at several different points in the program Decision-Making - Answer in a program, if statements, if/else statements, and switch statements all allow the user to make decisions within the program. Condition - Answer a Boolean statement that allows different ac...

Protocol - Answer A set of predetermined rules on how information is sent and received. Virtual Private Network (VPN) - Answer A paid (but sometimes free) service that allows the user to create an encrypted link between the user and a remote server. Once connected, the user can anonymously access the information, data, or the internet using the remote server instead of his own machine. Computer network - Answer Allows different computers to communicate with one another. Local A...

System - Answer A set of principles or procedures following an organised scheme to process a set of inputs to produce a desired and reproducible output. Input-process-output - Answer The main parts of a system Feedback loop - Answer Allows inputs to be adjusted to respond to the outputs Extents of a system - Answer How large is the system? How powerful? How many users? How much hardware is required? Limitations of a system - Answer What prevents the system from exce...

Constructor - Answer In OOP a special type of method which has the same name as the class and is used to create objects. This creation process is known as instantiation. Instantiate - Answer The creation of an instance or particular realisation of an abstraction or template such as a class. The product of this is an object of the class type. In OOP this is done by using a particular method called a constructor. Object - Answer When a class is instantiated the product is one of the...

What is the difference between an object and a class? - Answer an object is an instance of a class what is class decomposition? - Answer breaking a programming problem into multiple classes where each class has a specific task to perform in solving the problem. what are two characteristics of an object? - Answer - state (Variables) - behaviour (Methods) what does it mean to instantiate an object? - Answer using a class's constructor to create an instance of an object. i...

Internet - Answer The Internet is a massive network of networks, a networking infrastructure. It connects millions of computers together globally, forming a network in which any computer can communicate with any other computer as long as they are both connected to the Internet. Information that travels over the Internet does so via a variety of standards known as protocols. World Wide Web - Answer A global system of hypertext documents, created using the Hypertext Markup Language and ac...

define - Answer Give the precise meaning of a word or phrase as concisely as possible state - Answer Give a specific name or other brief answer. No supporting argument or calculation is necessary. apply - Answer Use an idea, equation, principle, theory or law in a new situation. calculate - Answer Find an accurate answer using mathematical or other formal methods. Show the working unless instructed not to do so. "Convert", "Express" or "Simplify" may be use...

What do ACID properties do? - Answer ensure that the transaction get executed successfully and its effect permanently stored in the database. • If the transaction is rolled back, it must return the database to its last consistent state before the update. Describe situations suitable for data warehousing - Answer Strategic Planning • Strategic planning is a review and planning process that is undertaken to make thoughtful decisions about an organization's future in order to e...

CPU - Answer A central processing unit (CPU) is the electronic circuitry within a computer that carries out the instructions of a computer program by performing the basic arithmetic, logical, control and input/output (I/O) operations specified by the instructions. ALU - Answer an arithmetic logic unit (ALU) is a digital circuit that performs arithmetic and bitwise logical operations on integer binary numbers. CU - Answer The control unit is a component of a computer's central p...

A-D converter - Answer Analog-digital converter; "digitizer" address bus - Answer pathway from memory to processing unit carrying addressin in memory to and from where data is transferred arithmetic and logic unit (ALU) - Answer part of the CPU that performs arithmetic, logic, and similar operations CPU - Answer contains ALU, control unit, and registers control unit - Answer controls flow of data into CPU and its operation ? registers - Answer temporary sto...

What are the two types of updates? - Answer Automatic and Manual Lis some advantages of automatic updates - Answer Inexperienced users have an easy mechanism to get their updates. No need for software manufacturer to contact each user when the update is ready to be installed. List some disadvantages of automatic updates - Answer Users will miss updates if they are not connected to the internet. If updates bring a major change of system functions users may not be able to know how i...

SaaS (Software as a Service) - Answer software distribution model in which applications are hosted by a vendor or service provider and provided to customers over a network The four types of changing to a new system - Answer parallel running, pilot running, direct changeover and phased conversion Parallel Running - Answer both the old and new system run at the same time Pilot Running - Answer one section of the business is trying out the new software while one keeps using the...

Feasibility report/study - Answer A study conducted to conclude the potential of a project during or after the planning phase to determine whether it should be pursued. Change management - Answer A process of shifting individuals, teams, departments and organizations from the present state to a desired state (e.g. employee training). Legacy system - Answer Old technology, hardware, computer system, or application program. Business merger - Answer The combining of two or more...