Source: https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/6-1-1-digital-footprints [Revision notes](https://senecalearning.com/en-gb/revision-notes.md) › [KS3](https://senecalearning.com/en-gb/revision-notes/ks3.md) › [Computer Science](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science.md) › [Computer Science: KS3](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3.md) › Digital Footprints # Digital Footprints Computer Science: KS3, topic 6.1.1 ## Digital Footprints Millions of years ago, some dinosaurs left these footprints in some mud which dried and turned to stone and never went away. When you go online, your digital footprint may also stay for a long time. ### Online reputations ![Online reputations](https://image-v2.cdn.app.senecalearning.com/2018-08/13128edd-a03c-41b1-8384-e225d9de2159/instagram-logo.jpg) - Things you post or share online or on your phone or computer can be seen by people forever. - Some things can stay even when deleted on your device and be seen or used by people you don’t expect. - The information you share can be used now or in the future. ### Online tracking ![Online tracking](https://image-v2.cdn.app.senecalearning.com/2018-08/1d0de939-ca37-4425-a05a-4723d8977727/interview-job.jpg) - Websites and online services can track the sites you visit and collect information about your online activity. - This information can be used to build a profile of your interests and behaviour. - Some universities and employers may check a person's online activity when deciding whether to offer them a place or a job. ### IP addresses ![IP addresses](https://image-v2.cdn.app.senecalearning.com/2018-08/aae69c94-b52e-42da-bd22-a518ce13f5dc/Static-IP-Address-.jpg) - Every network has an identifying number called an IP address. - IP addresses can be traced back to the user. ## Test yourself on Digital Footprints - How long can things that you post or share online be seen by people for? - What is the name of the identifying number that every network has? [Practise this topic for free](https://app.senecalearning.com/classroom/course/b89946c5-cfe7-42d6-ae51-9b4631a07589/section/5b81548b-0b23-4b0a-84a2-a932dfbcb0e1/session) - Previous topic: [5.1.10 Are You Looking at Reliable Information?](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/5-1-10-are-you-looking-at-reliable-information.md) - Next topic: [6.1.2 Leaving a Safe Online Footprint](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/6-1-2-leaving-a-safe-online-footprint.md) ## Computer Science: KS3 contents ### 1 Computational Thinking & Algorithms - 1.1 Computational Thinking - [1.1.1 Abstraction Thinking](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/1-1-1-abstraction-thinking.md) - [1.1.2 Decomposition Thinking](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/1-1-2-decomposition-thinking.md) - [1.1.3 Algorithmic Thinking](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/1-1-3-algorithmic-thinking.md) - 1.2 Algorithms - [1.2.1 Algorithms](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/1-2-1-algorithms.md) - [1.2.2 Pseudocode](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/1-2-2-pseudocode.md) - [1.2.3 Flow Diagrams](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/1-2-3-flow-diagrams.md) - [1.2.4 Logical Reasoning & Debugging](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/1-2-4-logical-reasoning-and-debugging.md) - [1.2.5 Reading Algorithms](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/1-2-5-reading-algorithms.md) - [1.2.6 Correcting Algorithms](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/1-2-6-correcting-algorithms.md) - [1.2.7 Complete the Algorithm](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/1-2-7-complete-the-algorithm.md) - [1.2.8 Search Algorithms](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/1-2-8-search-algorithms.md) - [1.2.9 Linear Search](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/1-2-9-linear-search.md) - [1.2.10 Binary Search](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/1-2-10-binary-search.md) - [1.2.11 Sort Algorithms](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/1-2-11-sort-algorithms.md) - [1.2.12 Bubble Sort](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/1-2-12-bubble-sort.md) - [1.2.13 Insertion Sort](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/1-2-13-insertion-sort.md) - [1.2.14 End of Topic Test - Algorithms](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/1-2-14-end-of-topic-test-algorithms.md) ### 2 Programming - 2.1 Programming Fundamentals - [2.1.1 Variables & Constants](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-1-1-variables-and-constants.md) - [2.1.2 Comments](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-1-2-comments.md) - [2.1.3 Input & Output](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-1-3-input-and-output.md) - [2.1.4 Arithmetic Operators](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-1-4-arithmetic-operators.md) - [2.1.5 Relational Operators](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-1-5-relational-operators.md) - [2.1.6 Boolean Operators](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-1-6-boolean-operators.md) - [2.1.7 Sequence](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-1-7-sequence.md) - [2.1.8 Selection](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-1-8-selection.md) - [2.1.9 Iteration](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-1-9-iteration.md) - [2.1.10 Subroutines](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-1-10-subroutines.md) - [2.1.11 Scope](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-1-11-scope.md) - [2.1.12 Data Types](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-1-12-data-types.md) - [2.1.13 Casting](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-1-13-casting.md) - [2.1.14 Arrays](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-1-14-arrays.md) - [2.1.15 2D Arrays](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-1-15-2d-arrays.md) - [2.1.16 Lists](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-1-16-lists.md) - [2.1.17 2D Lists](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-1-17-2d-lists.md) - [2.1.18 Strings](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-1-18-strings.md) - [2.1.19 Syntax Errors](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-1-19-syntax-errors.md) - [2.1.20 Logic Errors](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-1-20-logic-errors.md) - [2.1.21 Runtime Errors](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-1-21-runtime-errors.md) - [2.1.22 End of Topic Test - Programming](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-1-22-end-of-topic-test-programming.md) - 2.2 Designing Code - [2.2.1 Code](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-2-1-code.md) - [2.2.2 Programs](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-2-2-programs.md) - [2.2.3 Writing Your Own Program](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-2-3-writing-your-own-program.md) - [2.2.4 Designing a ‘Basketball’ Game](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-2-4-designing-a-basketball-game.md) - [2.2.5 Turning an Algorithm into an App](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-2-5-turning-an-algorithm-into-an-app.md) - [2.2.6 End of Topic Test - Designing Code](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-2-6-end-of-topic-test-designing-code.md) - 2.3 Python - [2.3.1 Introduction to Python](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-3-1-introduction-to-python.md) - [2.3.2 Input](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-3-2-input.md) - [2.3.3 Output](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-3-3-output.md) - [2.3.4 Casting](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-3-4-casting.md) - [2.3.5 Type Coercion](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-3-5-type-coercion.md) - [2.3.6 Selection](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-3-6-selection.md) - [2.3.7 Iteration](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-3-7-iteration.md) - [2.3.8 Files](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-3-8-files.md) - [2.3.9 File Handling](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-3-9-file-handling.md) - [2.3.10 Identifiers](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-3-10-identifiers.md) - [2.3.11 Whitespace](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-3-11-whitespace.md) - [2.3.12 Comments](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-3-12-comments.md) - [2.3.13 Exceptions](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/2-3-13-exceptions.md) ### 3 Hardware & Software - 3.1 Hardware - [3.1.1 Elements of Computer Systems](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/3-1-1-elements-of-computer-systems.md) - [3.1.2 Central Processing Unit (CPU)](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/3-1-2-central-processing-unit-cpu.md) - [3.1.3 Registers of the Central Processing Unit (CPU)](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/3-1-3-registers-of-the-central-processing-unit-cpu.md) - [3.1.4 Factors Affecting CPU Performance](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/3-1-4-factors-affecting-cpu-performance.md) - [3.1.5 Fetch-Decode-Execute Cycle](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/3-1-5-fetch-decode-execute-cycle.md) - [3.1.6 Binary Systems](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/3-1-6-binary-systems.md) - [3.1.7 Logic Circuits](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/3-1-7-logic-circuits.md) - [3.1.8 Boolean Logic](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/3-1-8-boolean-logic.md) - [3.1.9 End of Topic Test - Logic](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/3-1-9-end-of-topic-test-logic.md) - 3.2 Software - [3.2.1 System Software](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/3-2-1-system-software.md) ### 4 Data - 4.1 Representing Data - [4.1.1 Binary](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/4-1-1-binary.md) - [4.1.2 Converting Binary & Hexadecimal](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/4-1-2-converting-binary-and-hexadecimal.md) - [4.1.3 Converting Denary & Hexadecimal](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/4-1-3-converting-denary-and-hexadecimal.md) - [4.1.4 Binary Arithmetic](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/4-1-4-binary-arithmetic.md) - [4.1.5 Representing Sound](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/4-1-5-representing-sound.md) - [4.1.6 Representing Images](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/4-1-6-representing-images.md) - [4.1.7 Character Sets](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/4-1-7-character-sets.md) - [4.1.8 American Standard Code for Information Interchange](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/4-1-8-american-standard-code-for-information-interchange.md) - [4.1.9 Unicode](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/4-1-9-unicode.md) - [4.1.10 End of Topic Test - Representation](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/4-1-10-end-of-topic-test-representation.md) ### 5 The Internet - 5.1 Networks - [5.1.1 Networks](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/5-1-1-networks.md) - [5.1.2 Geographical Classification of Networks](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/5-1-2-geographical-classification-of-networks.md) - [5.1.3 What is the Internet?](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/5-1-3-what-is-the-internet.md) - [5.1.4 The World Wide Web](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/5-1-4-the-world-wide-web.md) - [5.1.5 Uniform Resource Locators (URLs)](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/5-1-5-uniform-resource-locators-urls.md) - [5.1.6 Web Hosting](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/5-1-6-web-hosting.md) - [5.1.7 HTML](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/5-1-7-html.md) - [5.1.8 Searching the World Wide Web](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/5-1-8-searching-the-world-wide-web.md) - [5.1.9 Good Searching Tips](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/5-1-9-good-searching-tips.md) - [5.1.10 Are You Looking at Reliable Information?](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/5-1-10-are-you-looking-at-reliable-information.md) ### 6 Online Safety & Security - 6.1 Protecting Yourself Online - [6.1.1 Digital Footprints](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/6-1-1-digital-footprints.md) - [6.1.2 Leaving a Safe Online Footprint](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/6-1-2-leaving-a-safe-online-footprint.md) - [6.1.3 Online Safety](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/6-1-3-online-safety.md) - [6.1.4 Malware - Viruses](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/6-1-4-malware-viruses.md) - [6.1.5 Malware](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/6-1-5-malware.md) - [6.1.6 People Online](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/6-1-6-people-online.md) - [6.1.7 Your Feelings](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/6-1-7-your-feelings.md) - [6.1.8 Getting Help](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/6-1-8-getting-help.md) - 6.2 Computing and the Law - [6.2.1 Data Protection Act (1998)](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/6-2-1-data-protection-act-1998.md) - [6.2.2 Computer Misuse Act (1990)](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/6-2-2-computer-misuse-act-1990.md) - [6.2.3 Freedom of Information Act (2000)](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/6-2-3-freedom-of-information-act-2000.md) - [6.2.4 Plagiarism](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/6-2-4-plagiarism.md) - [6.2.5 Copyright](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/6-2-5-copyright.md) - [6.2.6 Copyright Designs and Patents Act (1988)](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/6-2-6-copyright-designs-and-patents-act-1988.md) - [6.2.7 Creative Commons Licensing](https://senecalearning.com/en-gb/revision-notes/ks3/computer-science/computer-science-ks3/6-2-7-creative-commons-licensing.md)