1.6. Security, privacy and data integrity
A subsection of Computer Science, 9608, through 1. Theory Fundamentals
Listing 10 of 18 questions
Give the definition of the terms firewall and authentication. Explain how they can help with the security of data. Firewall Authentication Describe two differences between data integrity and data security. Data integrity is required at the input stage and also during transfer of the data. State two ways of maintaining data integrity at the input stage. Use examples to help explain your answer. State two ways of maintaining data integrity during data transmission. Use examples to help explain your answer.
9608_s15_qp_13
THEORY
2015
Paper 1, Variant 3
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A Local Area Network is used by school staff who access data stored in a Database Management System (DBMS). Explain the difference between security and privacy of data. Give an example for this application where privacy of data is a key concern. Name and describe two security measures the Network Manager has in place to protect the security of the data held in the DBMS. A task for staff at the start of the school year is to key in new pupil data from a paper document. The data is entered to a screen form and includes the data verification of some fields. Describe what is meant by verification.
9608_w17_qp_12
THEORY
2017
Paper 1, Variant 2
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Frankie is a software developer. He is developing a program to manage customer records for a client with an online retail business. He must ensure that data stored about each customer are both secure and private. State the difference between security and privacy. Computer systems can be protected by physical methods such as locks. Describe two non-physical methods used to improve the security of computer systems. A computer uses parity blocks to check the data that has been received is the same as the data that has been transmitted. The following is an example of a parity block. Parity bit Data Parity byte Describe how a parity block check can identify a bit that has been corrupted during transmission. Give a situation where a parity block check cannot identify corrupted bits. One principle of the ACM/IEEE Software Engineering Code of Ethics is to always act in the best interest of the client. Explain how Frankie can ensure that he is acting in the best interest of his client. When the program is complete, Frankie uses a compiler to prepare the program for the client. Explain why Frankie uses a compiler instead of an interpreter.
9608_s19_qp_13
THEORY
2019
Paper 1, Variant 3
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A computer program makes use of data validation routines and verification of data input. Complete these two sentences about data validation and verification. 1. checks that the data entered is reasonable. One example is . 2. checks that the data entered is the same as the original. One example is . The program is installed on a computer system that has security measures in place to protect its data. Complete the following table. Security measure Description Data are written on two or more disks simultaneously. Encryption A copy of the data is taken and stored in another location.
9608_s20_qp_11
THEORY
2020
Paper 1, Variant 1
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An adventure sports company has a website. Customers can book courses using an online booking form. The booking form contains a number of fields. The following table gives a description of the validation for each field. Write the validation type for each validation description in the table. Field Validation description Validation type Name A name must be entered Date of Birth Entered as dd/mm/yyyy Telephone Number A limit of 15 characters can be entered Experience Level Only values between 1 and 5 can be entered Validation is one way to protect the integrity of input data. Identify one other method to protect the integrity of input data. The data input will be transferred to a central server. Identify two measures to protect the integrity of the data during transfer.
9608_s21_qp_13
THEORY
2021
Paper 1, Variant 3
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A small company produces scientific magazines. The owner buys some new desktop computers. The computers are used to store thousands of colour images (diagrams and photographs). All the computers have Internet access. Name three utility programs the company would use on all their computers. Describe what each program does. Description Description Description The images contained in the magazines are produced using either bitmap or vector graphics software. Give four differences between bitmap and vector graphics. Employees using the new computers receive training. At the end of the training, each employee completes a series of questions. Three answers given by an employee are shown below. Explain why each answer is incorrect. “Encryption prevents hackers breaking into the company’s computers.” “Data validation is used to make sure that data keyed in are the same as the original data supplied.” “The use of passwords will always prevent unauthorised access to the data stored on the computers.”
9608_w16_qp_11
THEORY
2016
Paper 1, Variant 1
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Questions Discovered
18