A paper shredder is a mechanical device used to cut paper into either strips or fine particles. Government organizations, businesses, and private individuals use shredders to destroy private, confidential, or otherwise sensitive documents.
The first paper shredder is credited to prolific inventor Abbot Augustus Low, whose patent was filed on February 2, 1909. His invention was however never manufactured.
Adolf Ehinger's paper shredder, based on a hand-crank pasta maker, was manufactured in 1935 in Germany. Supposedly he needed to shred his anti-Nazi propaganda to avoid the inquiries of the authorities. Ehinger later marketed his shredders to government agencies and financial institutions converting from hand-crank to electric motor. Ehinger's company, EBA Maschinenfabrik, manufactured the first cross-cut paper shredders in 1959 and continues to do so to this day as EBA Krug & Priester GmbH & Co. in Balingen.
Until the mid-1980s, it was rare for paper shredders to be used by non-government entities.
A high-profile example of their use was when the U.S. embassy in Iran used shredders to reduce paper pages to strips before the embassy was taken over in 1979, but some documents were reconstructed from the strips, as detailed below.
After Colonel Oliver North told Congress that he used a Schleicher cross-cut model to shred Iran-Contra documents, sales for that company increased nearly 20 percent in 1987.
Paper shredders became more popular among U.S. citizens with privacy concerns after the 1988 Supreme Court decision in California v. Greenwood; in which the Supreme Court of the United States held that the Fourth Amendment does not prohibit the warrantless search and seizure of garbage left for collection outside of a home. Anti-burning laws also resulted in increased demand for paper shredding.
More recently, concerns about identy theft have driven increased personal use, with the US Federal Trade Commission recommending that individuals shred financial documents before disposal.