Abstract: The present invention relates to a method of encoding and decoding an optical disc, which could contain both confidential data and public viewing data. The method manipulates on the file system of the optical disc and protects the confidential data with ID field, password entry mechanism and burner/player/reader using the method of the present invention. Further, the present invention provides control over types of audience and time of viewing since ordinary optical disc player can only play public viewing data and the present invention complying player will be able to play the confidential data providing with correct password and ID field.

Abstract: The present invention relates to a method of encoding and decoding an optical disc, which could contain both confidential data and public viewing data. The method manipulates on the file system of the optical disc and protects the confidential data with ID field, password entry mechanism and burner/player/reader using the method of the present invention. Further, the present invention provides control over types of audience and time of viewing since ordinary optical disc player can only play public viewing data and the present invention complying player will be able to play the confidential data providing with correct password and ID field.

Abstract: A hunter's tree stand and backpack frame is formed by a seat frame having a seat and having cam members at the end of the seat disposed adjacent a tree or upright.The seat frame having a chain stop adjacent each side of the seat for supporting the seat at a selected elevation by the cams binding the tree between the cams and a first chain surrounding the tree.Downwardly projecting legs secured to the seat are provided with tree engaging prongs for maintaining the seat in a preferably horizontal position, normal to the tree axis. A turnbuckle secured with the seat frame engages a second chain extended around the tree below the cams and first chain to secure the depending portion of the frame to the tree.