Definition: "Confidentiality" refers to the privacy of data, software and hardware that is associated with information infrastructure. Individuals who wish to do harm to a company or organization are constantly seeking out holes in the confidentiality of an information system to exploit.  Even being casual about confidential information on a computer screen can be a problem.  Everyone must be careful.

Information about personnel, equipment, procedures, software versions and any other critical data should be confidential and made available to only those people within the organization who have a need to know. A loss of mission critical information can be disastrous. To maintain confidentiality you need an information security plan.  

Its Relevance: A business or organization must protect the privacy of its critical information infrastructure and avail itself of every security tool. the company might otherwise be deemed to be negligent. Mission critical data must secured and kept from those who would steal proprietary information or deliberately harm the organization. Companies now function in an asymmetric threat environment, which means that attempts to do damage to an information infrastructure can emanate from a wide variety of unpredictable sources.

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