Redaction tools are software that is used to edit content and, thereby, selectively and reliably remove information from documents or websites before sharing the remaining content with someone who is not authorized to see the entire original document. The process of “redacting” documents has been used in the legal profession for decades to black out confidential or privileged information during the exchange of documents during litigation. The process has also been used by government agencies to censor sensitive material when responding to Freedom of Information Act (FoIA) requests. In the manual process, someone takes a paper copy of the document and uses a heavy black marker to cross out the information to be excluded. Redaction tools have been included as part of document imaging products since their introduction. In electronic documents, redaction refers to the permanent removal of information, not the masking or obfuscating of data.