Public Key Infrastructure - What is a PKI? - Cryptography - Practical TLS

Throughout this course, we've been discussing three key players: Client, Server, and Certificate Authority. These three identities create what's known as a PKI, or a Public Key Infrastructure. Each element of a PKI serves a specific purpose:

- Servers - Need to prove their Identity
- Clients - Need to validate an Identity
- Certificate Authority - Governs the whole process by issuing identities (in the form of Certificates) to Servers.

Most of us are familiar with the public web PKI, these are the Client/Server/CAs that secure every HTTPS website on the Internet. But there are other PKIs that exist, like Code signing PKIs, or even Internal website PKIs.

This lesson is a free sample lesson from the the greatest TLS and SSL training course ever created. No instructor rambling on about pointless stories. No slides with massive walls of text. No time wasting. Only simple, effective, and precise explanations. Complimented with practical illustrations and visuals.

🔐 More details about the course:

🏢 Do you configure or troubleshoot TLS/SSL for work? If so, I'm willing to bet your employer would happily pay for this SSL training. Reach out if you'd like to coordinate an introduction for a bulk license purchase with your company. I'm happy to provide a generous referral bonus =)

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🖧 Want to learn how how data moves through a network?

0:00 - Intro
0:34 - Confidentiality, Integrity, Authentication
1:12 - Hashing - Fingerprints, Message Authentication Codes (MACs)
1:46 - Symmetric Encryption - Encryption
2:05 - Asymmetric Encryption - Key Exchange, Signatures, Encryption
2:38 - Bulk Data vs Limited Data
3:04 - How SSL/TLS uses Cryptographic Tools to secure Data
6:32 - PKI - Public Key Infrastructure
7:25 - Outro

Since you've made it to the bottom of the Description, here's a $100 off coupon code you can use on the full course =)
YT100

[PracticalNetworking]

💲 *Coupon Code* for 50% off: youtube50

[cursory]

No way this man helped me clear my thoughts on PKI in less than 6 minutes. Big appreciation.

[sumeetkarve]

Loved the simplicity with which the whole course explains the concepts. Kudos to the creater👍

[PracticalNetworking]

🥳🥳 *Promotion Ended - Congrats @James* 🥳🥳

For the rest of you, you can use this discount code for $100 off the course: YT100

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📢📢 Practical TLS - Course Giveaway 📢📢

I'll be picking a random person from all the comments in the next 7 days on this video to give a scholarship for free access to the full Practical TLS course.

All you have to do is make a post to enter. Check back in a week to see if you won. =)

[Kheneh]

This is my go-to guy for any networking concept I'm struggling with. And he always delivers!! Thanks a lot, man.

[shadesdude]

Thank you, I spent a whole just trying to understand this concept, and you finished it in 5 minutes. Thank You

[govindabs]

The best and simple explanation of PKI so far. It solved all my doubts. Keep up the great work. Subscribed instantly.

[ammaralshouli]

I use to study through INE but I didn't get the full image about cryptography, watching this course free in youtube make feel guilty.
thank you from the bottom of my heart

[maxmaster]

Although my English is weak, but I understand your lessons very well, because of your simple explanation and graphic presentation. Thank you so much

[adedejiemmanuel]

Thanks Ed. I was beginning to think that you reneged on the promise to post every Monday. I would be missing the nuggets you give. Thank God you are keeping up! Another great vid. I like the real world examples to you give, these make it real.

[marvinkruger]

Thank you so much - you teach way better than my teacher at university!

[realnanact]

You always make complex subject very simple.

[materubass]

Another great video in this cryptography series, always very detailed and with good examples. Keep up this great work! It would be awesome to have a future video on secure management of encryption keys. KMS, HSM, HSM as a Service, even the key lifecycle. Topics that are very related to the series although not many people talk about it

[davidnchinga]

Straightforward explanation. Thank you

[teeraded]

Thank you this fundamentally builds and strengthens the understanding of concept and the only channel Ive respected so far. Just a suggestion, would be even better if more linking of the concept to an example of a real world is done. For example in case of CA of corporate and installation, still not clear or see a vivid picture of what CA is in reality

[sandarbhsuryawal]

Man superb video and this pace is perfect ❤ Thank you.

[nadimakhtar]

Hey, @Practical Networking you make a great video, and thanks for such a great initiative of giving scholarships. I am doing my undergraduate in Computer Engineering from India. I really like your content. You explain even the toughest concept in a very simple and easy-to-understand manner. I have already watched almost all the videos on your youtube channel. I really want to learn more about TLS in-depth if you give me this scholarship then it will really help me a lot. I request you to please consider me for the scholarship. Also waiting for move videos.

[CFH]

Awesome video! cheers and good luck to all the entries for the course giveaway :)

[borroms]

Great explanation. Thank you for sharing!

[bakri]

very clear video very informative, Thank you