How do I handle user data securely?
Quick Answer
Use established services for authentication and storage. Minimise the data you collect. Understand privacy laws like GDPR and Australia's Privacy Act. When in doubt, consult a professional.
Full Explanation
Data security is one area where cutting corners can have serious consequences. Here's what you need to know:
Fundamental principles:
Collect only what you need: Every piece of data you store is a liability. Don't collect data 'just in case'-have a clear reason for everything.
Use established services: Supabase, Auth0, and Clerk have security teams you don't. They handle encryption, secure storage, and compliance. Don't build your own.
Never store sensitive data in plain text: Passwords should be hashed (handled by auth services). API keys shouldn't be in your codebase.
Practical security checklist:
- Use authentication services, not custom login systems
- Enable SSL/HTTPS (automatic on Vercel, Netlify)
- Set up proper database access rules (row-level security in Supabase)
- Keep API keys in environment variables, not code
- Have a privacy policy that accurately describes what you collect
Australian considerations:
- Privacy Act 1988 applies if you're doing business in Australia
- You need to disclose what data you collect and why
- Users have rights to access and delete their data
- Data breaches may have notification requirements
If your app handles health data, financial data, or children's data, consult a lawyer. The stakes are too high for guesswork.
Related Questions
What are the security risks of AI-generated code?
AI code can have security vulnerabilities like any code. Common issues include improper input validation, weak authentication, and exposed API keys. Professional review is recommended for sensitive applications.
How do I add user authentication?
Use a service like Supabase Auth, Clerk, or Auth0. Never build authentication from scratch. AI tools integrate these services well and they handle security complexities you don't want to manage.
How do I accept payments in my app?
Stripe is the standard choice-it integrates with most AI tools and handles subscriptions, one-time payments, and tax compliance. Expect to spend some time on this integration.
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