Lesson Notes By Weeks and Term v4 - JHS 1
INFORMATION SECURITY
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INFORMATION SECURITY
Download the Lessonotes Mobile Ghana app for faster lesson access on Android and iPhone.
Subject: Computing
Class: JHS 1
Term: 3rd Term
Week: 3
Grade code: B7.3.3.1.1
Strand code: 3
Sub-strand code: 3
Content standard code: B7.3.3.1
Indicator code: B7.3.3.1.1
Theme: COMMUNICATION NETWORKS
Subtheme: INFORMATION SECURITY
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In our daily lives, we use and share information all the time. Think about your school report card, your parents' Mobile Money (MoMo) account details, or even a private conversation on WhatsApp. This information is valuable and needs to be protected, just like you protect your belongings in a chop box or lock the door to your house. Information security is the practice of protecting this valuable information from being seen by the wrong people, being changed without permission, or being unavailable when you need it most. This lesson will introduce the three fundamental rules or principles that guide all information security efforts.
This section breaks down the core ideas you need to understand. What is Information? Before we talk about protecting it, what is information? Information is processed data. It is any detail that has meaning. Examples: Your name and age, your BECE results, your father’s bank account number, a photo of your family, a secret you share with a friend. What is Information Security? Information Security is the set of rules and actions we take to protect information and information systems (like computers and phones) from unauthorized access, change, or destruction. Simple Analogy: Think of a letter you write to your best friend. You put it in an envelope so only your friend reads it. (Protection from unauthorized access) You seal the envelope so no one can open it and change your words. (Protection from change) You make sure to deliver it to your friend so they can read it when they need to. (Protection from destruction/unavailability) The Three Key Principles: The CIA Triad The foundation of information security is built on three main principles. We can remember them with the acronym CIA.
C - Confidentiality I - Integrity A - Availability
Let's break them down one by one. Confidentiality (The Secret-Keeping Principle) Definition: Confidentiality ensures that information is not disclosed or made available to people who are not supposed to see it. It's about keeping secrets secret. Keyword: Secrecy / Privacy. Ghanaian Example: Your parent's Mobile Money (MoMo) PIN. This PIN should only be known by your parent. If a fraudster (scammer) gets the PIN, they can access the account and steal money. This is a breach of confidentiality. Your medical records at the hospital are also confidential; only you and your doctor should see them. How we achieve it: Using passwords, PINs, encryption (jumbling up messages so only the receiver can read them), and locking our phones. Integrity (The Trustworthy Principle) Definition: Integrity ensures that information is accurate, consistent, and has not been changed or tampered with by an unauthorized person. It's about trusting that the information is correct. Keyword: Accuracy / Trustworthiness. Ghanaian Example: Imagine your teacher enters your exam score as 95% in the computer. Integrity means that when you or your parents check the score, it is still 95%. If a mischievous student hacks into the system and changes your score to 45%, the integrity of the information has been lost. The information is no longer trustworthy. Another example is a MoMo balance; it must accurately reflect the money in the account. How we achieve it: Using security systems that track changes, digital signatures, and limiting who has permission to edit information. Availability (The Ready-When-Needed Principle) Definition: Availability ensures that information and the systems that store it are accessible and usable when authorized users need them. Keyword: Accessibility / Uptime. Ghanaian Example: Think about the day the BECE results are released online. Thousands of students want to check their results. If the results-checker website crashes because too many people are visiting it, the information is not available. This is a failure of availability. Similarly, if the Mobile Money network is down when you urgently need to send money to a sick relative, availability has been compromised. How we achieve it: Having backup systems, protecting against viruses that can shut down computers, and ensuring good network connections.
| Principle | Keyword | Simple Explanation | Ghanaian Example | | :-------------- | :-------------- | :---------------------------------------------------- | :----------------------------------------------------------------------------- | | Confidentiality | Secrecy | Keeping information private and away from prying eyes. | Your WhatsApp messages are for you and your friend only, not the whole class. | | Integrity | Accuracy | Making sure information is correct and not changed. | Your school fees balance on the receipt must be the correct amount you paid. | | Availability | Accessibility | Ensuring you can get to your information when you need it. | The electricity company's prepaid app must be working when you need to buy credit. |