From the course: Ethical Hacking: Cryptography
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What does cryptography mean?
From the course: Ethical Hacking: Cryptography
What does cryptography mean?
- [Narrator] Cryptography in its most basic definition is simply the conversion of data into a scrambled form. Before we into how we do that, why do we do that? So cryptography has four main uses. The first one is authentication. In a digital world, how do you prove you are who you are, how do you prove a digital identity? The next is integrity. We trust ourselves, our surroundings to digital bits and bytes that are controlling our world. How do I ensure that that information hasn't been altered from its original form, hasn't been manipulated from what it was supposed to be? The next is confidentiality. There's a very real need to restrict access to data to only those who are approved to access it, and cryptography's a way we can do that. The last is non-repudiation. Non-repudiation is this concept that a sender of information receives confirmation that the data was received, and that recipient receives confirmation of the…
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