Security Basics: Protecting Data and Systems ยท Lesson 1 ยท 3 minutes
Spot Secret Data
Spot data that must stay private
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Aria at the clinic
Aria manages records at a clinic. Some files can cause harm if strangers see them. This is sensitive data.

Which file is sensitive data?
- A patient's blood test result
- The clinic front door opening hours
Answer: A patient's blood test result
Medical illnesses cause harm or embarrassment if strangers see them.
Public or private?
Not all data needs high protection. Public facts are safe to share. Sensitive facts must stay hidden.

Does every piece of text need the highest protection?
- Yes, protect all text equally.
- No, only data that causes harm if exposed.
Answer: No, only data that causes harm if exposed.
Only data that causes harm or loss if exposed needs strong secrecy.
Complete the rule for Aria's clinic:
Data that causes ___ if seen by strangers is ___ data.
Answer: Data that causes harm if seen by strangers is sensitive data.
Sensitive data can cause direct harm to people if revealed.
Assemble the reason to hide home addresses:
Answer: A home address brings stalker risk keep it private
Sensitive data brings risk if someone leaks it.
Aria looks through papers. Which two are sensitive data?
- Credit card payment numbers
- A list of medicine prices
- Patient phone numbers and passwords
Answer: Credit card payment numbers / Patient phone numbers and passwords
Bank cards and secret passwords cause financial and personal harm.
What to remember
- Sensitive data can cause harm if strangers see it.
- Public information does not need the same high defence.
- Health files, passwords, and bank cards must stay secret.
Next in this course: Need to Know. It carries on in the Breni app.