Is our data safe? (RSA simply explained)

82,777 views

Niklas Steenfatt

Published on Feb 14, 2021
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???? My complete productivity system: https://fokus.so Our private data should be encrypted, please! But what does that even mean? In this video, I explain how the encryptions you entrust your data and passwords to every day work. I explain the basic principle of symmetric encryption, in which a message is made unrecognizable by combining it with a secret password. Over time, cryptography has developed increasingly sophisticated methods for this, from the old Caesar cipher to the Enigma machine and the modern AES. However, all of these methods have one thing in common: they are fundamentally unsuitable for encrypting modern communication. The basic problem that has long left IT security researchers baffled: how do you agree on a password when you have not yet established a secure connection? For a long time, it was not clear whether this problem could be solved at all. It was not until the mid-1970s that an ingenious solution was found in which one-way functions and prime numbers play a major role. In the video I present in detail the mathematics that enables the RSA method, which is still widely used today. It is a major factor in ensuring that nowadays, even in public WiFi networks, passwords cannot be read in order to hack user accounts. This was a very big problem just 10 years ago. Finally, I explain how RSA can also be used to create digital signatures and talk about trust networks. Calculating with residual classes by Daniel Jung: ► • Calculating with residual classes, part 1 Mat... ???? Viewer survey: https://forms.gle/p8xZt3Ag2LYZGewq9 ???? Newsletter: https://niklassteenfatt.com/ ▬ Timestamps ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬ 0:00 - Intro 0:32 - (un)encrypted passwords 1:30 - Bitcoin video? 1:56 - Structure of this video 2:14 - Symmetric encryption 6:54 - The problem with such encryptions 8:29 - Public key encryption 12:03 - One-way functions 14:22 - RSA (aka the nasty math part of the video) 19:28 - RSA summary 20:03 - Digital signatures 21:31 - Trust 23:23 - Final words Achieve your goals now: https://fokus.so

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