AQA · GCSE · Computer Science
Course version: 8525 · Version from Sept 2020
Software classification: security.
Within AQA 8525 software classification, 'security' refers to the role system software plays in protecting the computer, its data and its users.
Checked against the AQA 8525 specification (opens in a new tab) on .
- Point 12 of 12
Study notes
From the checked teaching notes for this specification point.
The idea
Within AQA 8525 software classification, 'security' refers to the role system software plays in protecting the computer, its data and its users. The operating system provides security features such as user accounts and passwords, access rights that limit what each user can see or change, and controls that help prevent unauthorised access. Security is therefore a function of system software rather than a separate category of application. When a multiple-choice question asks which software provides security, or what a security feature does, link it to the operating system managing access and protecting data. Applications may include their own login, but the underlying protection of the device and its files is a system software responsibility.
What earns the marks
- Security is a function of system software, chiefly the operating system, which protects the computer and its data from unauthorised access.
- User accounts and passwords are operating-system security features that control who can log on.
- Access rights (permissions) restrict what each user can view, change or delete, limiting damage and misuse.
- Security features help prevent unauthorised access to files and the system, protecting data integrity and privacy.
- Applications may offer their own sign-in, but device-level and file-level protection is provided by system software.
Common mistakes and how to put them right
Calling security a type of application software.
Put it right by linking security features to the operating system as system software.
Thinking a password alone secures everything.
Put it right by recognising that access rights also limit what a logged-in user can do.
Confusing security with backup or file management.
Put it right by focusing on preventing unauthorised access rather than copying or organising files.
Exam tips
- When asked which software provides security, choose the operating system rather than an application.
- Match each security feature to its purpose: accounts and passwords control log-on; access rights control what a user can do.
- Use the phrase 'prevent unauthorised access' to keep your reasoning focused on security.
Try the lesson
The start of the Software classification: security. lesson, made from checked teaching notes for this specification point.
Have a go first
A school wants software that protects its computers from malicious programs arriving by email. Which type of software is designed for this job?
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