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This wiki contains technical documentation for the Census Bureau's Disclosure Avoidance System used in protecting confidential information provided by respondents during the 2020 Decennial Census of Population and Housing. This particular release consists of the code used to generate the privacy-protected Microdata Detail File (using zero-Concentrated Differential Privacy via an exact sampler for the Discrete Gaussian Mechanism for its primary privacy-conferring primitives), which was in turn used to produce the Public Law 94-171 Redistricting Data Summary Files. These data contain tabulations used, notably, for redistricting and official population counts.