Asymmetric encryption

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Definition

A public key encrypts and a different private key decrypts; solves key sharing but is slower.

Example: HTTPS uses asymmetric encryption to share a session key.

Found in: school notes.

Short version to memorise (key terms bank)

Public key encrypts, private key decrypts.

Where you'll use it in the test

Syllabus area: Y12 Programming for the Web.

Question types it can appear in

Multiple choice: Pick the option that matches the definition or example.
Matching or table: Match it to its description, example or category.
Fill in the blanks: Choose this term to complete a statement or table.
Short answer: Define, outline or explain it and tie it to the scenario.

Where it has appeared in the paper

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

How to use it

A model sentence

General advice, built from the definition and example above

“A public key encrypts and a different private key decrypts; solves key sharing but is slower.” Then apply it: HTTPS uses asymmetric encryption to share a session key.

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

Sample exam Q3 (1 mark): Encryption (1 mark): official criteria and sample answer

Criteria

1: Identifies the correct answer.

Sample answer

Implement data encryption

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Go deeper

Flashcard: Asymmetric encryption in Programming for the Web (Year 12) · study that set
Memorise: Processes for securing the web
Key terms bank entry: Asymmetric encryption
Notes: Explain the processes for securing the web, including Secure Sockets Layer (SSL)… (Programming for the Web (Year 12))
Full term page: every question, note and marking comment for Asymmetric encryption

Check yourself

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

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