This paper presents a new steganographic filesystem manager called Crocus. When a filesystem is to be hidden, it is embedded separately into a set of innocent-looking containers piece by piece.  ...  A prototype system of Crocus has been developed for Linux and a preliminary experiment was performed. The result indicates the effectiveness of the framework of Crocus.  ...  Filesystem Management We can create a new filesystem by giving containers and a password to Crocus.  ...