A TSA security manual accidentally posted improperly redacted text on a public Web site for federal procurements. Such lapses often result from a simple misunderstanding of how electronic redaction works, analyst says. Blacking out or deleting the text doesn’t get rid of this metadata, expert says. The only way to ensure that sensitive data isn’t visually hidden is to remove it using redaction tools. There are “very strong, usable software tools that can be used for electronic redactions,” Gartner’s John Pescatore says.”]