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Chapter 8 Essentials

Security+ SY0-501 7th Edition Exam Essentials (Chapter 8)

QuestionAnswer
Be able to describe the process of a hashing algorithm. Hashing algorithms are used to generate a fixed-length value mathematically from a message. The most common hashing standards for cryptographic applications are the SHA and MD algorithms.
Know the principles of a symmetric algorithm. A symmetric algorithm requires that receivers of the message use the same private key. Symmetric algorithms can be extremely secure. This method is widely implemented in governmental applications.
Be able to describe the process of asymmetric algorithms. Asymmetric algorithms use a two-key method of encryption. The message is encrypted using the public key and decrypted using a second key or private key. The key is derived from the same algorithm.
Know the primary objectives for using cryptographic systems. The main objectives for these systems are confidentiality, integrity, authentication, and nonrepudiation. Digital signatures can be used to verify the integrity and provide nonrepudiation of a message.
Understand the process used in PKI. Enryption system that uses a variety of technologies to provide confidentiality, integrity, authentication, and nonrepudiation. PKI uses certificates issued from a CA to provide this capability as well as encryption.
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