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Coursera Usable Security Intro Week 1

Coursera Usable Security
Coursera開的新課,講的是Security,來學習一下。

introduction

Human Computer Interaction
Learning how people think, psychologically and cognitively.
Building models of that, and showing how that can be applied
to the design of technology.

Usabulity
We've built design methods that allow us to integrate people's tasks and
feedback into the systems that we built.

我們建立了些設計方法讓我們能夠整合人們的工作和feedback。

And we have lots of ways of evaluating systems for usability, to see how well
people can learn them, how well they remember how to use them, and how quickly
and efficiently they can accomplish their tasks within those systems.

我們用很多方式來評估系統的可用性,來明白人們的使用情況,人們是不是可以容易記得系統的使用方式,人們在系統下可以多快多有效率的的完成他們的工作。

Intro

So what we're going to cover in this class are the basics of human computer interaction.

How do we understand people's cognitive and psychological abilities?
How do we understand their tasks and what they're trying to do,
and then look at methods of designing that into systems and
evaluating how well the systems do?

We'll then, take those lessons and examine all kinds of different security and
privacy problems from authentication to social media privacy settings.

So we can see how you as a designer, can build in understandings of humans,
to make systems that are ultimately more secure.

如此一來我們從系統設計者的角度,基於了解人類的行為讓系統最終變得更安全。

Human Computer Interaction

What is Human Computer Interaction?
Human Computer Interaction, or HCI is the study of how people interact with technology.

Users 使用者
Tasks 使用者用系統想完成的工作。
Context 相同的使用者做相同的工作也可能有不同背景,就稱為Context。
Design 根據以上三者來設計系統
Evaluation 根據一些方法來評估系統是否對使用者來說很好用。

Usability

Measuring Usablility

測量的標準有下列幾樣:
Speed - How quickly can the task accomplished.
Efficiency - how many mistabke are made in accomplishing the task.
Learnability - how easy is it to learn to use the sytstem
Memorability - Once learned, how easy is it to remember how to use the system.
User Preference - What do users like?

各項標準測量的方式則分別使用以下方法:
Speed - timing
Efficiency - counting errors
Learnability - 折線圖


Memorability - 折線圖

User Preference - 問卷調查