CY8: Digital forensics basics

Lesson 5 of 5 · reading 15–25 minutes; practice and project time is on the module page

Timelines and findings

🎯You'll be able to

Combine sources into one timeline, mark what is fact and what is inference, and write findings that others can check.

🏠The everyday picture

A cricket match report lists each ball and what happened, then the commentator gives an opinion on why the team lost. Readers can tell which is which.

📘What it really is

📝A worked example

Input: your Project 3 timeline for S04, plus the evidence IDs from Lesson 3.

Steps:

  1. Add a source and evidence ID column to each row.
  2. Mark the inference rows, for example "password likely guessed (inferred from 7 failures in 4 minutes before the success)".
  3. Write four findings: way in, records accessed, start and end, and current status.

Expected output: a timeline with facts and inferences labelled, and a half-page of findings that refer to evidence IDs.

🌍Where it's used

📝Case scenario

An internal report said "the accountant stole the files". Logs only showed the accountant's account was used, from a shared office computer, while the accountant was on leave. The final report was rewritten to say what the evidence showed, and the investigation then found a colleague who knew the password.

🖱️Try it

Rewrite this sentence neutrally: "The receptionist leaked patient data at 3 a.m." Success: your version describes an account, an address and a time, and doesn't assume who was at the keyboard.

⚠️Common mistakes

🛠️For your project

Test 8 in Project 3 checks your timeline's UTC and IST columns. The capstone builds on it with sources, evidence IDs and labelled inferences.

✅Quick check

What's the difference between a fact and an inference in a timeline?

Show the answer

A fact comes directly from evidence; an inference is a conclusion drawn from it, and is labelled with its basis.

Why describe accounts rather than people?

Show the answer

An account being used doesn't prove its owner was the one using it.

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