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Welcome back, and in this lesson, I want to talk about digital signing or digital signatures. This is a process which you need to be familiar with to understand many other areas of IT, such as DNS sec or SSL certificates. If you havent watched my video on hashing, its linked in the description, and you should pause this video and go and do that now because its required knowledge for this video. At this point, though, lets jump in and get started straight away. Now, before I cover how digital signatures work in detail, I want to give you a quick refresher on public key cryptography. With public key cryptography, you generate two keys as part of the pair. We have on the left the private key, and this part is secret and should only ever be known by the owner. Then we have the public key, and this is not secret. In fact, anyone can know it or possess it. It should be public, and ideally, as widely distributed as possible. Now, these keys are related. Theyre generated as part of one op