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Flip to reveal answersThe three data-security methods
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All 4 Flashcards — Data security
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Question
The three data-security methods
Answer
Encryption (lock it with a key), masking (replace it with realistic fakes), erasure (destroy it so it cannot be recovered).
Question
What does blockchain protect?
Answer
Whether a record has been changed since it was written. NOT whether it was true when written, and not privacy.
Question
Delete vs erase
Answer
Deleting usually removes only the pointer; the contents stay until overwritten. Erasure overwrites the space.
Question
Why do most breaches happen?
Answer
Ordinary controls not kept up — a reused password (Colonial Pipeline, 2021), an unapplied patch (WannaCry, 2017).
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Full study notes for Data security
Topic 3.1 hub
Data
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