V6a: Public-Key-Kryptographie: Grundkonzepte (Applied Cryptography 101)

Welcome to "V6a: Public-Key Cryptography: Fundamental Concepts," an essential video in Alfred Menezes's "Crypto 101: Building Blocks" course. This video offers a comprehensive introduction to the core principles of public-key cryptography, a cornerstone of modern secure communications and data protection. Designed for computer science students, software engineers, mathematicians, applied cryptographers, and cybersecurity professionals, this lecture will enhance your understanding of key concepts in public-key systems. In this video, we address the limitations of symmetric-key cryptography, including the key establishment and key management problems. You’ll learn how public-key cryptography solves these issues and enables secure communication without the need for shared secret keys. We explore the concept of non-repudiation, a vital feature of digital signatures, which ensures that a sender cannot deny having sent a message. Additionally, the lecture covers Merkle's puzzles, a groundbreaking concept in public-key cryptography, and the role of public-key encryption and digital signatures in modern security protocols. You will also be introduced to hybrid cryptography, which combines the efficiency of symmetric-key cryptography with the security of public-key cryptography. This video is a must-watch for anyone looking to deepen their knowledge of public-key encryption, digital signatures, and the theoretical underpinnings of modern cryptographic systems. Strengthen your expertise with this free, state-of-the-art cryptography course! Lecture playlist: https://www.youtube.com/playlist?list=PLA1qgQLL41SRsHMtsb4up5fTytDeHV_yJ Course web page: https://cryptography101.ca/crypto101-building-blocks/ The slides are available on the course web page. "Public-key cryptography" chapter from "Textbook of Applied Cryptography": https://drive.google.com/file/d/1egfsGDamcT96_mS8qBoHBI0nzEhHtwK-/view Other cryptography courses: https://cryptography101.ca Slides 00:00 Introduction 01:17 Slide 211: Limitations of symmetric-key cryptography 01:46 Slide 212: Key establisment problem 02:36 Slide 213: Key establisment problem (2) 03:56 Slide 214: Key establisment problem (3) 04:40 Slide 215: Key management problem 05:13 Slide 216: Non-repudation is impractical 06:32 Slide 217: Public-key cryptography 07:30 Slide 218: Ralph Merkle (1974) 09:21 Slide 219: Merkle's research paper was rejected 10:10 Slide 220: Merkle puzzles 13:08 Slide 221: Merkle puzzles (2) 14:12 Slide 222: Key pair generation for public-key cryptography 15:22 Slide 223: Public-key encryption 17:41 Slide 224: Digital signatures 20:02 Slide 225: Digital signatures (2) 20:38 Slide 226: Public-key versus symmetric-key cryptography 21:47 Slide 227: Hybrid schemes 24:29 Coming up