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All right, I'm super excited to start a brand new section.



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It's my favorite section because I'm mostly walking into public key infrastructure, digital signatures,



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cryptography and risk management.



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That is why cryptography is my favorite topic.



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I can talk all day long you want, but that won't be the situation because here we are to cover the



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fundamentals of cryptography.



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If you value cryptography and algorithms and encryption and encryption involves a lot of mathematical



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concepts.



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And since this course is not for the people who want to learn the detailed cryptography, we are not



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going to learn about the probability.



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The statistics, random numbers are pseudo random numbers or anything mathematical.



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We are here to have an overview of cryptography because people what people do is they dive directly



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into the mathematical cryptography before understanding cryptography.



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So if you're looking for that cause, I suggest you to go to a website known as Coursera.



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They have really good courses by famous professors from all the U.S. universities.



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I'm not doing a paid promotion or any kind of thing.



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It's my honest opinion because I've studied cryptography and mathematical cryptography from their website.



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So it's better that you learn from the professors who have been teaching them for a long time.



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So, all right.



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So what are we going to learn in this wonderful section?



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First of all, we are going to have overview of cryptography.



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Then we'll see why we need cryptography.



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Why where was the invention of cryptography and what actually cryptography does?



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Then we'll dive into the types of ciphers will first understand us.



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What is a cipher?



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Then we'll talk about symmetric encryption or asymmetric encryption, which you have heard these terms



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very commonly.



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Then we will talk about RSA and we have an algorithm.



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Then we'll talk about hashing what is a hash digital hash.



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Then what is public key infrastructure, which has become very common and very useful because of this



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pandemic period.



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Public infrastructure.



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What are digital signatures and what how do we exactly share documents over the Internet with full security?



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Then we'll talk about the security alert and transport layer security.



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SSL Lentulus.



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It's actually B less.



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It's not.



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And then finally, we'll talk about cryptanalysis.



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If you're expecting to listen to words such as Bitcoin terrorism or block chain, well, that is not



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entirely cryptography.



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That is cryptocurrency and it mainly lives into Blockin.



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I will try to include a section on Block Jenah as well, but for the time being, we have presented



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this section to you.



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So without wasting any much time in the next lecture, we'll start right over with the overview of cryptography.



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Stay tuned.



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Keep moving forward.