MODULE 04
Secure Coding
Master secure coding practices, prevent platform vulnerabilities, and protect user privacy.
3 hours
3 Topics
Exam Weight: 20%
Learning Objectives
- Follow best practices for secure coding
- Prevent platform vulnerabilities (web, mobile, IoT)
- Prevent privacy vulnerabilities
Topics
TOPIC 4A
Follow Best Practices for Secure Coding
Implementing secure coding standards, code signing, and avoiding common programming errors.
1 hour
- Secure coding checklists and standards
- Code signing and verification
- Common programming errors to avoid
- Secure use of third-party libraries
- Memory safety and resource management
- Secure random number generation
- Secure string handling
Secure Random Number Generation
Using cryptographically secure random number generator
python
import secrets
import string
def generate_secure_token(length=32):
"""Generate a cryptographically secure random token"""
return secrets.token_hex(length)
def generate_secure_password(length=16):
"""Generate a secure random password"""
alphabet = string.ascii_letters + string.digits + string.punctuation
return ''.join(secrets.choice(alphabet) for _ in range(length))
def generate_api_key():
"""Generate a secure API key"""
return secrets.token_urlsafe(32)
# Examples
print(f"Token: {generate_secure_token()}")
print(f"Password: {generate_secure_password()}")
print(f"API Key: {generate_api_key()}")- Use linters and static analysis tools configured for security
- Follow the principle of least privilege in code
- Always validate and sanitize inputs
- Use established cryptographic libraries