From the course: CISSP Cert Prep (2021): 3 Security Architecture and Engineering

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Goals of cryptography

Goals of cryptography

From the course: CISSP Cert Prep (2021): 3 Security Architecture and Engineering

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Goals of cryptography

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- [Narrator] Security professionals use cryptography for several different reasons. We can describe those reasons using the five goals of cryptography. First, the most common goal of cryptography is to preserve confidentiality. Confidentiality ensures that unauthorized individuals are not able to gain access to sensitive information. If Alice and Bob are communicating with each other using encryption, they want to ensure that their communication remains private and even of a third party, Mal intercepts their communication. She is unable to read the contents of those messages. When we use cryptography to protect the confidentiality of information, we consider three different states of data where it might be exposed to prying eyes. Data at rest is data stored on a hard drive or other storage device. We can use encryption to protect stored data so that it remains protected even if the device is…

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