the underlying text, and setting the background color to match the text color. In both of these cases, the redacted material still exists in the document underneath the visible appearance and is subject to searching and even simple copy and paste extraction. Proper redaction tools and procedures must be used to permanently remove the sensitive information. This is often accomplished in a multi-user workflow where one group of people mark sections of the document as proposals to be redacted, another group verifies the redaction proposals are correct, and a final group operates the redaction tool to permanently remove the proposed items. See also Censorship Data erasure Data remanence Freedom of information laws by country Lacuna References External links Embarrassing Redaction Failures from Vol. 58 No. 2, May 2019, Technology column of The Judges' Journal published by the American Bar Association Classified information Data security Classified documents