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.

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https://classes.pracnet.net/courses/p...

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   • Networking Fundamentals  

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

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