Strong box

Strong box or strongbox may refer to:

A type of box

 * Strong box, a strongly built and secured casket (decorative box)
 * Safe, a strongly built and secured metal box

Arts, entertainment, and media

 * "The Strongbox" (1998 TV episode), the 170th episode of Seinfeld
 * The Strongbox Chronicles, a book written as Cate Dermody by C. E. Murphy

Computing and technology

 * Strongbox, the former name of SecureDrop, a secure communications platform