Security by design

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Definition

Building security into the software from the start of development rather than adding it at the end.

Example: Security by design uses cryptography and sandboxing from the first design step.

Found in: syllabus, school notes.

Short version to memorise (key terms bank)

Security built in from the start.

Where you'll use it in the test

Syllabus area: Y12 Secure Software Architecture.

Question types it can appear in

Multiple choice: Pick the option that matches the definition or example.
Short answer: Explain the contribution of cryptography and sandboxing
Extended response: Use it as a supporting point linked to the stimulus.

Where it has appeared in the paper

Secure Software Architecture (Part B, C). Part letters follow each paper’s own layout.

How to use it

A model sentence

General advice, built from the definition and example above

“Building security into the software from the start of development rather than adding it at the end.” Then apply it: Security by design uses cryptography and sandboxing from the first design step.

In a short answer, give the definition in your own words first, then tie it to the situation in the question. Do not copy the example above unless it fits the scenario.

Command words used with it

From the linked past questions

Identify: Recognise and name. (Sample exam Q3 (1 mark): Encryption)

Official worked answer

Familiarisation Q6 (3 marks): Sandboxing (3 marks): official criteria and sample answer

Criteria

3: Thorough discussion of the use of sandboxing in the operating system. 2: Some understanding of the advantages and/or disadvantages. 1: Identifies a feature of sandboxing.

Sample answer

Sandboxing allows each application to be isolated so that it cannot pose a security risk by accessing system resources or other applications. However, it requires more resources as each application requires its own container. It may also be less convenient for users to access resources such as the device's camera or files as the sandbox will either prevent access or make it more difficult.

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Go deeper

Flashcard: Security by design in Secure Software Architecture (Year 12) · study that set
Memorise: Cryptography and sandboxing in 'security by design'
Key terms bank entry: Security by design
Notes: Use and explain the contribution of cryptography and sandboxing to the ‘security by… (Secure Software Architecture (Year 12))
Notes: Cryptography and sandboxing in 'security by design' (Secure Software Architecture (Year 12))
Full term page: every question, note and marking comment for Security by design

Check yourself

Explain “Security by design” in one sentence, give an example, and name a question type that could test it.

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