grouped them topic-wise so you can teach, learn, or use them practically. 🔐 IMPORTANT CYBER SECURITY CODES (LEGAL & ESSENTIAL) 1️⃣ PASSWORD SECURITY CODES ✅ Password Hashing (SHA-256)
Below is a complete collection of IMPORTANT & COMMONLY USED CYBER SECURITY CODES that are legal, defensive, and industry-relevant.
These are the core codes every cybersecurity learner must know today.
I’ve
Why: Never store plain passwords.
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Python
import hashlib
def hash_password(password):
return hashlib.sha256(password.encode()).hexdigest()
print(hash_password("Secure@123"))
✅ Password Verification
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Python
def verify_password(input_pass, stored_hash):
return hashlib.sha256(input_pass.encode()).hexdigest() == stored_hash
✅ Password Strength Checker
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Python
import re
def password_strength(pwd):
if len(pwd) < 8:
return "Weak"
if not re.search("[A-Z]", pwd):
return "Add Uppercase"
if not re.search("[0-9]", pwd):
return "Add Number"
if not re.search("[@#$%^&*]", pwd):
return "Add Special Character"
return "Strong"
print(password_strength("Test@123"))
2️⃣ ENCRYPTION & DECRYPTION (DATA SECURITY)
✅ Symmetric Encryption (AES – Fernet)
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Python
from cryptography.fernet import Fernet
key = Fernet.generate_key()
cipher = Fernet(key)
msg = b"Confidential Data"
encrypted = cipher.encrypt(msg)
decrypted = cipher.decrypt(encrypted)
print(encrypted)
print(decrypted)
✔ Used in cloud, apps, databases
3️⃣ FILE INTEGRITY & MALWARE DETECTION
✅ File Hash Check (Detect File Change)
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Python
import hashlib
def file_hash(file):
with open(file, "rb") as f:
return hashlib.md5(f.read()).hexdigest()
print(file_hash("data.txt"))
✔ Detects tampering or malware infection
4️⃣ LOGIN SECURITY & ATTACK PREVENTION
✅ Login Attempt Limit (Brute Force Protection)
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Python
attempts = 0
def login(password):
global attempts
if password != "admin@123":
attempts += 1
if attempts >= 3:
return "Account Locked"
return "Wrong Password"
return "Login Successful"
✅ CAPTCHA Logic (Basic)
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Python
import random
captcha = random.randint(1000,9999)
print("Captcha:", captcha)
user = int(input("Enter captcha: "))
print("Verified" if user == captcha else "Failed")
5️⃣ NETWORK & SYSTEM SECURITY
✅ IP Address Checker
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Python
import socket
hostname = socket.gethostname()
ip = socket.gethostbyname(hostname)
print(ip)
✅ Open Port Scanner (Own System Only)
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Python
import socket
s = socket.socket()
s.settimeout(1)
for port in range(20, 1025):
try:
s.connect(("127.0.0.1", port))
print("Open:", port)
except:
pass
✔ Used in security audits (authorized)
6️⃣ LOG MONITORING & ALERTS
✅ Detect Suspicious Login Attempts
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Python
logins = ["success", "fail", "fail", "fail"]
if logins.count("fail") >= 3:
print("Alert: Suspicious Activity")
7️⃣ PHISHING PROTECTION
✅ Email Link Checker
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Python
url = "http://secure-login.xyz"
if not url.startswith("https://"):
print("Warning: Unsafe Link")
8️⃣ INPUT VALIDATION (SQL Injection Prevention)
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Python
import sqlite3
conn = sqlite3.connect("users.db")
cursor = conn.cursor()
cursor.execute(
"SELECT * FROM users WHERE username=? AND password=?",
("admin", "test123")
)
✔ Prevents SQL Injection
9️⃣ DATA BACKUP & RECOVERY
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Python
import shutil
shutil.copy("important.txt", "backup_important.txt")
🔥 WHY THESE CODES ARE IMPORTANT TODAY
✔ Protect student & user data
✔ Prevent hacking attempts
✔ Used in real companies
✔ Needed for cyber laws compliance
✔ Mandatory for IT & teaching platforms
🎯 HOW YOU CAN USE THIS
📘 Teaching Cyber Security
💼 Cyber Security Job
🎥 YouTube Classes
🧪 Lab Practice
🧠 Interview Preparation
🚀 NEXT STEP (I CAN HELP MORE)
If you want, I can:
Create Cyber Security syllabus
Make YouTube lecture plan
Build Beginner → Pro roadmap
Prepare certification path (CEH, Security+)
Teach in Hindi + English
👉 Just tell me your goal: Job / Teaching / YouTube / Freelancing
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