From the course: CISA Cert Prep: 5 Information Asset Protection for IS Auditors

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Cryptography overview: Part 1

Cryptography overview: Part 1

From the course: CISA Cert Prep: 5 Information Asset Protection for IS Auditors

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Cryptography overview: Part 1

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- [Instructor] All right, let's talk about crypto algorithms, encryption. This is the first part in a two-part series of videos here about encryption algorithms, so let's get into it. So before we start talking about the actual algorithms and their specifics, let's talk about some important definitions, important terms, when we talk about encryption. So a cryptosystem is all of the necessary things that you need to encrypt and decrypt something. The software, the protocols, the algorithm, the keys, all the bits and pieces that you need to actually encrypt and then decrypt something. Well, PGP, pretty good privacy, is an example of a cryptosystem. Anything that encrypts and decrypts something, that's a cryptosystem. So plaintext is the readable, not yet encrypted or decrypted stuff that you have before you actually, or after you actually, encrypt or decrypt something. Ciphertext is the encrypted gobbledygook, the result of encrypting something. So you may also hear the term cleartext…

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