Cross-posted from: https://lemmy.zip/post/18686329 (the first OPSEC community on Lemmy, feel free to join us)

Guide to Determining Your Threat Model

Creating a solid threat model is an essential step in improving your operations security (OPSEC). It helps you identify potential threats, assess their impact, and prioritize your defenses. Here’s a step-by-step guide to help you develop your own threat model.

1. Define Your Assets

First, list the things you want to protect. These might include:

• Personal Information: Name, address, phone number, Social Security number, etc.
• Financial Information: Bank account details, credit card numbers, financial records.
• Digital Assets: Emails, social media accounts, documents, photos.
• Physical Assets: Home, devices (computers, smartphones, etc.).

2. Identify Potential Threats

Next, think about who or what could pose a threat to your assets. Possible threats include:

• Hackers: Individuals or groups looking to steal data or money.
• Government Agencies: Law enforcement or intelligence agencies conducting surveillance.
• Corporations: Companies collecting data for marketing or other purposes.
• Insiders: Employees or contractors who might misuse their access.
• Physical Threats: Burglars or thieves aiming to physically access your assets.

3. Assess Your Vulnerabilities

Identify weaknesses that these threats could exploit. Consider:

• Technical Vulnerabilities: Unpatched software, weak passwords, outdated systems.
• Behavioral Vulnerabilities: Poor security habits, lack of awareness.
• Physical Vulnerabilities: Insecure physical locations, lack of physical security measures.

4. Determine the Potential Impact

Think about the consequences if your assets were compromised. Ask yourself:

• How critical is the asset?
• What would happen if it were accessed, stolen, or damaged?
• Could compromising this asset lead to further vulnerabilities?

5. Prioritize Your Risks

Based on your assessment, rank your risks by considering:

• Likelihood: How probable is it that a specific threat will exploit a particular vulnerability?
• Impact: How severe would the consequences be if the threat succeeded?

6. Develop Mitigation Strategies

Create a plan to address the most critical risks. Strategies might include:

• Technical Measures:

  • Use strong, unique passwords and enable two-factor authentication.
  • Keep your software and systems up to date with the latest security patches.
  • Use encryption to protect sensitive data.

• Behavioral Measures:

  • Be cautious with sharing personal information online.
  • Stay informed about common scams and phishing tactics.
  • Regularly review your privacy settings on social media and other platforms.

• Physical Measures:

  • Secure your devices with locks and use physical security measures for your home or office.
  • Store sensitive documents in a safe place.
  • Be mindful of your surroundings and use privacy screens in public places.

7. Continuously Review and Update

Your threat model isn’t a one-time project. Review and update it regularly as your situation changes or new threats emerge.

Example Threat Model

1. Assets:

   • Personal Information (e.g., SSN, address)
   • Financial Information (e.g., bank accounts)
   • Digital Assets (e.g., emails, social media)
   • Physical Assets (e.g., laptop, phone)

2. Threats:

   • Hackers (e.g., phishing attacks)
   • Government Agencies (e.g., surveillance)
   • Corporations (e.g., data collection)
   • Insiders (e.g., disgruntled employees)
   • Physical Threats (e.g., theft)

3. Vulnerabilities:

   • Weak passwords
   • Outdated software
   • Sharing too much information online
   • Insecure physical locations

4. Potential Impact:

   • Identity theft
   • Financial loss
   • Loss of privacy
   • Compromise of additional accounts

5. Prioritize Risks:

   • High Likelihood/High Impact: Weak passwords leading to account compromise.
   • Low Likelihood/High Impact: Government surveillance leading to loss of privacy.

6. Mitigation Strategies:

   • Use a password manager and enable two-factor authentication.
   • Regularly update all software and devices.
   • Limit the amount of personal information shared online.
   • Use a home security system and lock devices.