#581: AES Explained: How Encryption Protects Your Data

Big thanks to TryHackMe for sponsoring this video. Learn Cyber Security with Practical Labs on TryHackMe:https://tryhackme.com/DavidBombalTech Use my code DAVIDTECH25 to get 25% OFF on Annual Subscription! Dr. Mike Pound joins David Bombal to explain symmetric encryption, AES, secret keys, VPN encryption, TLS, block ciphers, stream ciphers and why encryption is one of the most important building blocks in modern cybersecurity. In this video, Mike explains what encryption actually does: it takes readable plaintext and turns it into unreadable ciphertext so that only someone with the correct secret key can decrypt it. He breaks down how symmetric encryption works, why the same key is used to encrypt and decrypt, and why algorithms like AES are used everywhere from secure websites and VPNs to BitLocker and full disk encryption. You’ll learn why AES is so fast on modern CPUs, how keys interact with encryption algorithms, and why AES uses rounds of substitution and permutation to scramble data. Mike also explains the difference between block ciphers and stream ciphers, including AES, DES, Triple DES, ChaCha20 and older algorithms like RC4 and A5/1. The discussion also covers why symmetric encryption is used for bulk encryption in protocols like TLS and IPsec, why asymmetric encryption is used differently, and why you should never write your own encryption algorithm or implement your own AES code for real-world security. If you want to understand how encryption protects your data, how VPNs and secure web traffic work, and why AES is still one of the most important algorithms in cybersecurity, this is a great place to start. // Mike SOCIAL // X: / _mikepound YouTube Channel: / computerphile // YouTube Video REFERENCE //Password Cracking: Can a Rainbow table reverse a hashed password?: • Password Cracking: Can a Rainbow table rev... // David's SOCIAL // Discord: discord.com/invite/usKSyzb Twitter: www.twitter.com/davidbombal Instagram: www.instagram.com/davidbombal LinkedIn: www.linkedin.com/in/davidbombal Facebook: www.facebook.com/davidbombal.co TikTok: tiktok.com/@davidbombal YouTube: / @davidbombal Spotify: open.spotify.com/show/3f6k6gE... SoundCloud: / davidbombal Apple Podcast: podcasts.apple.com/us/podcast... // MY STUFF // https://www.amazon.com/shop/davidbombal // SPONSORS // Interested in sponsoring my videos? Reach out to my team here: sponsors@davidbombal.com // MENU // 0:00 - Coming Up 0:27 - TryHackMe Sponsor 0:49 - Intro 01:18 - Symmetric vs Asymmetric Encryption 04:38 - Key Exchange and VPN Analogy 06:10 - Examples of Symmetric Algorithms 08:56 - Advantages of Stream vs Block Cyber 10:31 - Deeper AES Explanation 14:34 - Substitution, Permutation, Mixing in AES 19:24 - Don’t Implement your Own Encryption 20:16 - TryHackMe Sponsor - DEMO 24:21 - DES Algorithm and the NSA 26:01 - Where to Learn More about Encryption 27:42 - Outro Please note that links listed may be affiliate links and provide me with a small percentage/kickback should you use them to purchase any of the items listed or recommended. Thank you for supporting me and this channel! Disclaimer: This video is for educational purposes only. #symmetricencryption #aes #des