Encryption

Common prevention methods: Encryption

1.4.2 Identifying and preventing vulnerabilities

Identifying and preventing vulnerabilities — Note 7 of 8

What you need to know

Encryption converts data into an unreadable coded format, protecting it from unauthorised access. Only someone with the correct decryption key can convert it back to its original form.

What to know

Even if encrypted data is intercepted or stolen, it is meaningless without the decryption key.
Protects data during transmission (e.g. HTTPS) and at rest (e.g. encrypted hard drive).

Key terms

Encryption: Converting data into a coded format so that only authorised users with the correct decryption key can read it.

Exam technique

Tip:Encryption protects against DATA INTERCEPTION AND THEFT — if someone intercepts encrypted data, they cannot read it without the key.
Mistake:Saying encryption 'prevents hacking'. Encryption does not prevent interception — it makes intercepted data UNREADABLE.

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