From the course: Penetration Testing and Ethical Hacking
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Cryptography
From the course: Penetration Testing and Ethical Hacking
Cryptography
- [Instructor] Cryptography. We're going to look at the concepts, the definitions, then we're going to learn about types of cryptography and algorithms. So let's get started. We got a lot of information to start covering. Okay, first of all, cryptography concepts. Cryptography is a technique of encrypting clear text data into scrambled code. The reason why you would do this is keep it private, to hide it from someone who doesn't need to see that information, to keep it confidential. The encrypted data is then sent over the public or private network toward its destination to ensure its confidentiality. So again, we are going back to the CIA triad. We are ensuring confidentiality by encrypting data. This data, or encrypted data, is known as ciphertext, and is decrypted at the destination for processing. Now, strong encryption keys are used to avoid key cracking, and the objective of cryptography is not purely about confidentiality, but it's also concerns of integrity. You don't want…
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