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Let's Encrypt! Wait. Why? How? - WC Pune

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On December 3rd, 2015 a service called Let’s Encrypt entered its public beta. Backed by several major sponsors, the service caught on quickly. As of summer 2016, more than 5 million SSL certificates had been issued by Let’s Encrypt, nearly four million of which were active and unexpired.

If you are not familiar, Let’s Encrypt is a free, automated, open certificate authority that allows users to encrypt the data flowing to and from their websites easily and for free. The goal of Let’s Encrypt is to make data transfer over the internet secure by default. Towards that end, they have invested a considerable amount of time and energy in making it easy for users of all stripes to secure the data flowing in and out of their websites.

You may have already considered encrypting your website before — perhaps to perform better in search engines, or to gain the ability to accept payments on your website. Regardless of whether you’ve considered enabling SSL on your website or not, the goal of this talk is to demonstrate why encryption on your website matters. We will look at some practical examples and live demos of what data can be stolen from your website, even if you are using an encrypted wifi connection. Likewise, we’ll talk about how encryption of all websites — whether they’re dealing with sensitive information or not — makes the web a safer place for all of us.

Last, of course, we will look at how you can get started with Let’s Encrypt on your website. We’ll review the options available to you on common hosting providers, as well as walk through the steps for how you can set this up for yourself, if you have administrative access to your server.

If you already have Let’s Encrypt enabled on your site, this talk may be basic for you (although we’ll do a few cool demos that make for great party tricks, so feel free to stop by).

If you’ve never accessed your hosting provider’s website admin area (CPanel, Plesk, etc), this talk might be a bit hard for you to follow (although you should totally come and ask questions both during the presentation and after).

If you have a website and you’ve thought about enabling SSL on it but you just haven’t gotten around to it yet, this talk will be perfect for you. By the end of this presentation, you should not only know how to enable encryption on your website, but you will understand why it’s so important that you do.

It sounds like an intimidating topic, but we can do this. Come on and let’s encrypt!

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Let's Encrypt! Wait. Why? How? - WC Pune

  1. 1. LET’S ENCRYPT! WAIT. WHY? HOW? WordCamp Pune | @NancyThanki
  2. 2. WHAT IS HTTPS
  3. 3. HTTP PROTOCOL + SECURITY ▸ SSL/TLS ( Secure Sockets Layer / Transport Layer Security) ▸ keeps your passwords, communications, and credit card details safe between your computer and the servers you’re communicating with on the other side. ▸ still speaking in HTTP, but the communication is encrypted and decrypted
  4. 4. HOW DOES IT WORK? HELLO —> CERTIFICATE EXCHANGE —> KEY EXCHANGE 1. ClientHello message ▸ aka the information the server needs to connect to the client via SSL ▸ server will respond with a ServerHello i.e. similar info including the cipher suite and version of SSL to be used 2.Certificate Exchange ▸ the server needs to prove its identity via its SSL certificate* ▸ does it either (a) implicitly trust or (b) is it verified by one of many CAs 3. Key Exchange ‣ Encryption via a symmetric algorithm using a single key * the client may also need to prove its identity, but not always
  5. 5. WHAT’S THE POINT? ▸ HTTP requests and responses can now be sent through an encrypted plaintext message ▸ i.e. verifies that you’re talking directly to the the server you think you’re talking to ▸ But because only the other side knows how to decrypt this message, Man In The Middle Attackers are unable to read or modify any requests that they may intercept. ▸ i.e. ensures that only that server can read what you send and only you can read what it sends Diffie–Hellman Key Exchange
  6. 6. WHILST THE LITTLE GREEN PADLOCK AND THE LETTERS “HTTPS” IN YOUR ADDRESS BAR DON’T MEAN THAT THERE ISN’T STILL AMPLE ROPE FOR BOTH YOU AND THE WEBSITE YOU ARE VIEWING TO HANG YOURSELVES ELSEWHERE, THEY DO AT LEAST HELP YOU COMMUNICATE SECURELY WHILST YOU DO SO. Rob Heaton
  7. 7. SIGNIFICANCE OF SSL
  8. 8. ▸ if you see encrypted traffic today, you can generally assume there is a reason. ▸ by encrypting everything you give cover to those who need it ▸ for example political dissidents
  9. 9. SNOWDEN LEAKS
  10. 10. PRIVACY AS A RIGHT
  11. 11. FREEDOM OF SOFTWARE* * well respected within the WordPress community
  12. 12. FREEDOM OF PRIVACY
  13. 13. FREEDOM TO USE SOFTWARE + FREEDOM TO USE IT PRIVATELY
  14. 14. NEVER “JUST” A BLOG
  15. 15. HOW DOES SSL WORK?
  16. 16. HOW DOES SSL WORK? WHY DOES IT PROTECT SENSITIVE INFORMATION? 1. 2 key encryption ▸ private key and public key agree on a key for this exchange ▸ symmetric algorithm with asymmetric encryption ▸ anyone can encrypt using the public key, but only the server can decrypt using the private key 2. digital signature is “signed” by another authority 3. self-signing
  17. 17. WHAT IS A “CA”? (AKA CERTIFICATE AUTHORITY)
  18. 18. “A NOTARY FOR THE WEB”
  19. 19. WHAT IS “LET’S ENCRYPT”?
  20. 20. WHAT IS “LET’S ENCRYPT”? SETUP OF A DOMAIN VALIDATION (DV) CERTIFICATE* 1. Download Let’s Encrypt on your server that has the address www.oohshinywebsite.com: sudo apt-get install lets-encrypt 2. You run it as sudo telling it you want to get a certificate for your domain lets-encrypt oohshinywebsite.com * DV Certificate = “the CA checks the right of the applicant to use a specific domain name. No company identity information is vetted and no information is displayed other than encryption information within the Secure Site Seal.” There are other types of certificates with varying requirements.
  21. 21. SO…HOW DO YOU ENCRYPT YOUR SITE?
  22. 22. SHARED HOSTING ‣ Bluehost ‣ GoDaddy ‣ SiteGround ‣ WP Engine ‣ DreamHost ‣ HostGator ‣ Big Rock ‣ Hosting Raja ‣ Hostripples ‣ Domain Racer ‣ InMotion Hosting ‣ LE’s community list
  23. 23. HOW TO ENCRYPT YOUR SITE VPS AND OTHER SERVER SETUPS ▸ nginx - https://www.digitalocean.com/community/tutorials/ how-to-secure-nginx-with-let-s-encrypt-on-ubuntu-14-04 ▸ Apache - https://www.digitalocean.com/community/ tutorials/how-to-secure-apache-with-let-s-encrypt-on- ubuntu-14-04 ▸ Centos vs Debian/Ubuntu - https://www.linode.com/docs/ security/ssl/install-lets-encrypt-to-create-ssl-certificates
  24. 24. WORDPRESS.COM It’s already done. Learn more here and here. Sign up here
  25. 25. COMMON ISSUES
  26. 26. THE BAD ▸ No wild cards, i.e. difficult in multi/ load-balanced setup ▸ Renewal every 90 days THE GOOD ▸ Easy to setup ▸ Free to use ▸ Good for single server setups
  27. 27. COMMON ISSUES JETPACK ▸ change WordPress settings ▸ Dashboard > Settings > General ▸ site URL, WordPress URL GOOGLE SEO ▸ your search rankings vs any modicum of care you have for your audience
  28. 28. FAQS
  29. 29. FAQS I SET IT ALL UP. DOES THIS MEAN I WON’T BE HACKED? No. Absolutely not. WILL IT MAKE MY SITE SLOWER? Not really. WHAT’S THE DIFFERENCE BETWEEN “LET’S ENCRYPT” AND PAID SSL CERTIFICATES? Nothing technically. But within things like PR or insurance… kinda.
  30. 30. COMMON MISCONCEPTIONS
  31. 31. COMMON MISCONCEPTIONS* AUTHENTICATION “A proper SSL certificate also provides authentication. This means you can be sure that you are sending information to the right server and not to a criminal’s server.” INTEGRITY “because it’s now over HTTPS, and you’re protecting against MITM attacks you can be assured that the information is in fact the information you’re meant to get.” ENCRYPTION “it encrypts the information as it’s being transferred from the browser to the web server. This is known as encryption in transit, and talks to nothing about encryption at rest.” * Read Tony Perez’s article :)
  32. 32. COMMON MISCONCEPTIONS* PHISHING if the website housing the phishing page has https, and it is verified, it will show the user that lovely green padlock. NATION STATE ATTACKS “My advice, assume everything you do online — HTTPS or HTTP — is being monitored. IN CONCLUSION It’s definitely a critical piece of the overarching security wheel associated with website security, but it’s not going to stop websites from getting hacked, the distribution of malware or keep website owners safe. * Read Tony Perez’s article :)
  33. 33. CROWDFUNDING LET’S ENCRYPT GITHUB
  34. 34. SOURCES ▸ http://robertheaton.com/2014/03/27/how-does-https-actually-work/ ▸ http://security.stackexchange.com/questions/11464/getting-a-root-ca-accepted-in-systems-and- browsers ▸ http://robertheaton.com/2015/04/06/the-ssl-freak-vulnerability/ ▸ https://blog.hartleybrody.com/https-certificates/ ▸ https://www.cryptologie.net/article/274/lets-encrypt-overview/ ▸ https://letsencrypt.org/getting-started/ ▸ https://www.youtube.com/watch?v=OZyXx8Ie4pA ▸ https://www.globalsign.com/en/ssl-information-center/types-of-ssl-certificate/ ▸ https://medium.com/@kevinsimper/review-of-getting-free-https-with-let-s-encrypt-5515f74be5f6#. 5qzjv4bc8 ▸ https://perezbox.com/2015/07/https-does-not-secure-your-website/
  35. 35. ऑटोमॅिटक येथे सामील व्हा ▸ अजर् पाठवा - http://automattic.com/work-with-us ▸ अिधक मािहती पािहजे का ? ▸ आमच्या काउंटर वर आपले स्वागत आहे
  36. 36. COME WORK WITH US! ▸ Be a part of products that power over 27% of the web ▸ Collaborate with and learn from over 500+ colleagues in 60+ countries ▸ Set work hours that are convenient for you and your family ▸ Earn a globally competitive salary while living in India ▸ Travel a few times a year to meet your team, and engage with the wider WordPress community ▸ Apply at http://automattic.com/work-with-us ▸ Want to learn more? ▸ Come chat with us at our booth!

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