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CISSP Training Kit by David R. Miller

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Cryptography in use

By now, you should have a solid view of how cryptography works, but where and how does cryptography fit into a contemporary information system? Remember that the primary objectives of a cryptosystem are to provide the following security services, ideally in a cost-justified manner, balancing the need for security (required protection for the valuable information assets) with the cost of implementation.

  • Confidentiality

  • Authentication

  • Nonrepudiation

  • Integrity

  • Secure key distribution

This balance links to the risk assessment and information classification covered in Chapter 1 and the resulting policies that dictate what satisfactory protection is for each data element based on that classification. These policies define the strength ...

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