K-anonymity

K-anonymity is a model of individual privacy with respect to a database that has been released to the public. Attributes corresponding to the entities or rows of the database are either suppressed or generalized until each row or entity is identical with at least k-1 other rows. At this point the database is said to have been k-anonymized.

Related paper

P. Samarati. Protecting respondent’s privacy in microdata release. IEEE T. Knowl. Data En., 13(6):1010–1027, 2001 pdf