PYTHON File To Check If Anyone Changed Your Files! | Very Easy!
In this video, you’ll learn how to check if someone changed your files with Python in a simple and beginner-friendly way.
File tampering can happen due to malware, unauthorized access, or even accidental changes. Even one small change in a file completely alters its cryptographic hash. In this tutorial, I demonstrate how to build a Python File Integrity Checker that detects these changes using SHA-256 hashing.
This concept is widely used in:
Ethical hacking
Cybersecurity and blue-team operations
Digital forensics
Malware detection
System integrity monitoring
We start by creating a trusted baseline hash for a file. When the file is checked again, Python recalculates the hash and compares it with the stored value to instantly determine whether the file was modified or left untouched.
No advanced setup.
No external libraries.
Just a clean Python script that clearly explains how file integrity monitoring works.
🧑💻 Python File Integrity Checker Code
import hashlib, json, os
BASE = "baseline.json"
def hash_file(path):
h = hashlib.sha256()
with open(path, "rb") as f:
for b in iter(lambda: f.read(4096), b""):
h.update(b)
return h.hexdigest()
file = input("Enter file path: ")
if not os.path.isfile(file):
print("File not found")
exit()
hash_now = hash_file(file)
data = json.load(open(BASE)) if os.path.exists(BASE) else {}
if file not in data:
data[file] = hash_now
print("Baseline created")
elif data[file] == hash_now:
print("No change detected")
else:
print("File modified!")
print("Old:", data[file])
print("New:", hash_now)
data[file] = hash_now
json.dump(data, open(BASE, "w"), indent=2)
🔹 What You’ll Learn
What file integrity means (in simple terms)
How hashing works in cybersecurity
How Python detects file changes
Why even small changes matter in security
Real-world use cases of file integrity monitoring
🔹 Who This Video Is For
Python beginners
Cybersecurity and ethical hacking students
Developers interested in file security
Anyone curious about protecting important files
⚠️ Disclaimer
This video is for educational and defensive security purposes only. Always test scripts on files and systems you own or have permission to use.
🔗 Follow me for more ethical hacking & cybersecurity content
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🌐 Website: https://mrhackercharlie.unaux.com
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