What is the process of using existing classified information to create new material that reflects the source information's classification markings called?

The process of using existing classified information to create new material that retains the classification markings of the source information is known as derivative classification. This process is essential within the framework of information security as it ensures that any new documents or materials created based on classified information maintain the appropriate level of sensitivity and protection.

Derivative classification involves careful consideration of the original source's classification and ensuring that the derived material is accurately marked to reflect that classification. This is a critical responsibility for individuals who handle classified information, as it helps to safeguard national security and prevent unauthorized disclosure of sensitive information.

While original classification involves determining the classification level of information for the first time, derivative classification specifically pertains to the reuse and adaptation of already classified information. Reclassification refers to changing the classification level of existing material, and classified information processing does not specifically define the creation of new classified material based on existing sources.