Applying cryptography in secure software design

This activity helps you apply your understanding of cryptography to system design, with an exam-style question to practise writing a structured response.

Structuring prompt

Before answering the question, brainstorm examples of where cryptographic techniques might support these security goals in a system:

Design goal	How cryptography supports it
Data protection
Regulatory compliance
Security by design
Privacy

Examples to consider:

• Password hashing

• HTTPS

• Encrypted file storage

• Digital signatures

• API key validation

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Extended response question (5 marks)

Question

Explain how cryptographic techniques support the design of secure software systems. In your response, refer to at least two of the following design goals: – data protection – security by design – privacy – regulatory compliance