id: "SI-22" title: "Information Diversity" family: "SI" family_name: "System and Information Integrity" sort_id: "si-22" priority: "P1" implementation_level: "system"
Identify the following alternative sources of information for {{ insert: param, si-22_odp.02 }}: {{ insert: param, si-22_odp.01 }} ; and
Use an alternative information source for the execution of essential functions or services on {{ insert: param, si-22_odp.03 }} when the primary source of information is corrupted or unavailable.
Guidance
Actions taken by a system service or a function are often driven by the information it receives. Corruption, fabrication, modification, or deletion of that information could impact the ability of the service function to properly carry out its intended actions. By having multiple sources of input, the service or function can continue operation if one source is corrupted or no longer available. It is possible that the alternative sources of information may be less precise or less accurate than the primary source of information. But having such sub-optimal information sources may still provide a sufficient level of quality that the essential service or function can be carried out, even in a degraded or debilitated manner.
Assessment Objective: {{ insert: param, si-22_odp.01 }} for {{ insert: param, si-22_odp.02 }} are identified;
Assessment Objective: an alternative information source is used for the execution of essential functions or services on {{ insert: param, si-22_odp.03 }} when the primary source of information is corrupted or unavailable.
System and information integrity policy
system and information integrity procedures
personally identifiable information processing policy
system design documentation
system configuration settings and associated documentation
list of information sources
system security plan
privacy plan
other relevant documents or records
Organizational personnel with information security and privacy responsibilities
organizational personnel with systems security engineering responsibilities
system developers
Automated methods and mechanisms to convert information from an analog to digital medium