From the course: CompTIA CySA+ (CS0-002) Cert Prep: 4 Software and Systems Security

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Goals of cryptography

Goals of cryptography

From the course: CompTIA CySA+ (CS0-002) Cert Prep: 4 Software and Systems Security

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Goals of cryptography

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- [Instructor] Security professionals use cryptography for several different reasons. We describe those reasons using the four 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 if a third party, Mal, intercepts their communication, she is unable to read the contents. The second goal of cryptography is integrity. Integrity protects data against unauthorized modification. If Alice and Bob are communicating with each other, they want to make sure that Mal is not able to tamper with the contents of the message. Bob wants to know that the message he received claiming to be from Alice is actually the message that Alice sent. The…

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