Privacy Security Cybersecurity
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Practice Question
Why B is Correct
The key phrase is "even after the breach occurred." Once an attacker has accessed the database, the question becomes: what protects the data itself?
Encryption transforms readable data into an unreadable format using a key. Even if attackers steal encrypted data, they cannot read it without the decryption key.
The other options are preventive measures that might stop a breach from happening, but they do not protect data after a breach has occurred:
- Password policies - prevent unauthorized access but do not protect data once accessed
- Firewalls - monitor and block suspicious traffic but cannot protect data already stolen
- Phishing training - prevents social engineering attacks but does not protect stored data
Common Mistakes
Many security measures prevent breaches. Encryption is unique because it protects data even after a breach. This is called "defense in depth" - having multiple layers of security.
Read questions carefully for timing words like "after" or "even if." These signal that you need to identify which measure provides protection at a specific point in an attack timeline.
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