When you hear the word cryptography used, what does it mean? In this video, explore the concept of cryptography.
- [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 sender's identity.…So I know if I send you something,…I know that you got it, and you know with confidence…
Note: The Ethical Hacking series maps to the 20 parts of the EC-Council Certified Ethical Hacker (CEH) exam (312-50) version 10.
- Different types of cryptography
- Symmetric and asymmetric encryption
- Cryptographic hashing
- How digital certificates work
- Public key infrastructure (PKI) components
- Protocols that use cryptography
- Common types of cryptographic attacks