What does "SD" stand for in classification terms?

In classification terms, "SD" stands for "Sensitive Data." This designation is used to identify information that, if disclosed, could cause harm to national security or the interests of an organization. Sensitive Data is often subject to strict access controls and handling guidelines to prevent unauthorized disclosure and ensure that the information remains protected.

Understanding the term "Sensitive Data" is crucial, as it reflects the importance assigned to certain types of information and the necessary precautions taken to secure it. This designation is part of a broader classification system designed to protect information based on its potential impact if disclosed.

The other terms listed do not appropriately align with how classification terms are defined in this context. For instance, "Source Document" generally refers to original documents used to create information, rather than a classification type. "Secure Document" may imply a document that is secured but isn't a formal classification category in the same way as Sensitive Data. "Standard Data" does not align with classification terminology, as it doesn't indicate any specific security implications or protections associated with particular types of information.