Reciprocity

Reciprocity is a

"[m]utual agreement among participating enterprises to accept each other’s security assessments in order to reuse information system resources and/or to accept each other’s assessed security posture in order to [[information sharing|share information.|undefined"

Source

 * NIST, Recommended Security Controls for Federal Information Systems and Organizations (NIST SP 800-53, Rev. 3) (Aug. 2009).