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1.3.2 The characteristics of colour

Screens can only display a subset of the colours visible to the human eye. This limits the accuracy of colour reproduction. There is also variation between computers, so a web page on a PC may look different when viewed on a Macintosh. There are similar problems with colour printers.

These issues can cause problems for some sectors, such as the fashion industry.

There are also differences in the way we perceive colour from a screen compared to the way we perceive colour from paper
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1.3.1 The role of colour

We can use colour in the following ways.

  • To draw attention. You will often find that important buttons or areas of the screen are a different colour. For example, warning signs are often in bright colours, such as amber or red. Your eyes are drawn to these colours.

  • To show status. As the status becomes more critical, the colour might change. An example of this is traffic lights changing from amber to red.


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2.3 How to use text to good effect

Two aspects of the use of text are:

  • How to ensure that your text is legible.

  • How to write text that suits the medium.

We consider the first of these in this section. We do not cover how to write English that is appropriate for your particular readers here. However, it is important to ensure that your text does not contain words or expressions that may be unclear to your readers. You must select text that is meaningful
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1 1 Getting the best from interaction devices

Once we have chosen an interaction device for a user interface, we need to consider how to use it effectively. We have relatively little control over the appearance or use of input devices, so we concentrate on the design of the feedback provided by output devices. In particular, we concentrate on the following software components that form this feedback.

  • Text. How can we ensure that the text is legible? Which font should we use? How long shou
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Introduction

Why is the way something looks important? Text, colour, images, moving images and sound all interact to produce a user friendly environment within a user interface. This unit will help you understand the effect each software component has on the user and explain how a consistent and thoughtful application of these components can have a significant impact on the ‘look’ of final product.

This unit is from our archive and is an adapted extract from User interface design and evaluation
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Acknowledgements

The content acknowledged below is Proprietary (see terms and conditions). This content is made available under a Creative Commons Attribution-NonCommercial-ShareAlike 2.0 Licence

Grateful acknowledgement is made to the following sources for permission:

Figures

Figure
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8 Summary

This unit has discussed the importance of information assets to any modern organisation and has made the case for information security management. It has introduced you to extracts from the British Standard on Information Security Management and to the approach advocated in the Standard for establishing and managing an information security management system (ISMS). It has also introduced the PDCA cycle. A particular focus in this unit has been on the planning of an ISMS, and on the four tasks
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6.2.3 Likelihood, impact and risk

Having looked at threats, vulnerabilities, outcomes and impacts, we are now in a position to offer a definition of risk with regard to threats to the information assets of an organisation. This definition will lead to an approach to measuring and assessing risk that is consistent with the Standard and with IT Governance: A Manager's Guide to Data Security & BS 7799/ISO 177799 (the Set Book). This systematic approach to risk assessment corresponds to Stage 3 of the ISMS documentation ta
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6.2.2 Threats and vulnerabilities

A hacker who threatens your organisation's information assets is taking advantage of vulnerabilities in the media and systems which handle them. Vulnerabilities and threats clearly go hand-in-hand: each threat is directed at a vulnerability.

The relationship between information assets, threats, vulnerabilities and existing defences is illustrated in Author(s): The Open University

5.4.2 The Statement of Applicability

The composition of the Statement of Applicability of the ISMS is Stage 8 of the ISMS planning process.

Activity 16

Read the section of Chapter 6 of the Set Book entitled ‘Selection of controls and statement of applicability’
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5.3 Setting up an ISMS

Clause 4.1 of Part 1 of the Standard describes the processes and personnel required to support an ISMS under development or in operation. Chapter 4 of IT Governance: A Manager's Guide to Data Security & BS 7799/ISO 177799 (the Set Book) provides a detailed description of each of the components of such support systems, as well as exploring their interrelationships.


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5.2.1 ISMS documentation

ISMS documentation is carried out at organisation level. Its purpose is to define the scope and context of the proposed system, and the approach to information security management that it will embody. It has five stages: three that initiate the planning process (Stages 1 to 3) and two that complete it (Stages 8 and 9).

  • Stage 1: define the scope of the ISMS The context and scope of the ISMS are defined by considering the nature of the organisa
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3.2.2. Legislation

In Chapter 1 of IT Governance: A Manager's Guide to Data Security & BS 7799/ISO 177799 (the Set Book), the section entitled ‘Legislation’ lists the UK legislation that affects the management of information security. One way to appreciate the relevance of legislation to an organisation is to identify the rights and entitlements it establishes and then to establish whether the organisation or its stakeholders have an interest in those rights and entitlements. For each law considered,
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1 Why is information security important?

This unit introduces you to information security and its management.

A succinct definition of information security might run as follows:

Information security is the collection of technologies, standards, policies and management practices that are applied to information to keep it secure.

But why is it important to secure information? And how should its security be managed? To s
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9 Adware and spyware

The previous sections of this topic have been concerned with email, but the Internet provides yet more problems, in the form of adware and spyware on the Web. You may have seen pop-up messages on your browser screen offering services or products. What you may not realise is that if you respond to these messages, extra software may be installed alongside other programs without your knowledge.

Adware

Adware is ‘free’ software that is subsidised by displaying adverts


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6.2 Protecting yourself against hoaxes

Hoax messages are usually received via work colleagues, family or friends. You may also see them if you are on mailing lists or you read messages on newsgroups.

You should ask yourself the following questions:

  • Do I know the sender?

  • Is the sender a virus expert?

  • Should I check with my antivirus company?

You should always carry out the last point on this list before acting on any message you recei
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4.1 Email attachments

Following some simple rules should help you to minimise the risks from malware. The first rule is:

  • Never ‘double click’ to open a file attached to an email

Instead, what you should do is:

  • Create a folder called ‘Attachments’ (or something similar) in an accessible location within your file structure. Mine is in ‘My Documents’ and is called ‘My Received Files’.


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2.8 Reference sourcing quiz

1 When referencing an image what details should be included alongside the image?

  • A The URL of the image

  • B The file name of the image

  • C The image URL
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2.7 How to reference sources

You have seen how easy it is to find what what you want on the Web. When you quote any information or use any images that you have not written or created yourself it is important to ensure that you reference the source of the quote or image. This is to show that you are not trying to pass off someone else's work as your own, and to enable your reader, should they wish, to access the source of that quote.

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2.5 Bookmarking websites

Most browsers allow you to keep a record of links to websites that you have found useful. These are called ‘Bookmarks’ in Firefox and ‘Favorites’ in Internet Explorer, and may have other names, such as a ‘Hot List’, in other browsers. For convenience I've chosen to call them bookmarks. Browsers usually offer the facility for organising the bookmarks into folders and sub-folders so that you can keep track of them as your collection grows.

You may well have a collection of boo
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