A Tasty Treats Podcast for Web Developers.

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Wes Bos

Wes Bos

Full Stack JavaScript Developer. Creator of really good web development courses. BBQ enthusiast.

Scott Tolinski

Scott Tolinski

Web Developer, Creator of Level Up Tuts, Bboy, Robotops Crew and Youtuber

Playing: 159: Hasty Treat - Front End Security



Jul 8th, 2019

Hasty Treat - Front End Security

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In this Hasty Treat, Scott and Wes talk about front end security and what to do in order to avoid hacking.

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Show Notes

2:53 - SSL

  • Encrypted transfer of information
  • Digitally binds a cryptographic key to an organization's details
  • Web-cam, geolocation, etc.

6:15 - innerHTML

  • React's dangerouslySetInnerHTML
    • Name intentionally chosen to be frightening
    • Allows you to write HTML to the DOM
    • Data should be sanitized before used in prop
      • Removes unexpected data from string
      • Used to prevent cross site scripting attacks

10:25 - Don't trust the client

  • The client can be manipulated to send any info to your server
  • E-commerce example โ€” don't take the price total from the front end to make the charge, DB call and calculate on the server
  • Validate form inputs via HTML 5 field validation/check data types on the server
    • Don't allow your users to send an object when it should just be a string
    • Get this for free with GraphQL via types

13:41 - PCI Compliance

  • Protect card holder data

    • SSL or Secure iFrame
  • Encrypt transmission of card data

  • Restrict access to card holder data

  • Restrict physical access

    • Front of front-end

    16:44 - Tips

  • Don't put a name on sensitive fields if you are using JS

  • HTTP only cookies

  • Local Storage tokens

  • XSS

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