A method and apparatus for preventing leakage from a fitting coupling a first and second fluid supply line to an environment surrounding the fitting is generally provided. The material may comprise a metal, such as magnesium, which is converted to magnesium oxide when exposed to heat and a source of oxygen. The user may select a distraction, and the video content may be played back from a corresponding playback point. In addition, the invented method makes the DH-secrets to be multiplied to further satisfy at least one of the following: deniability; pre-computability; and post-ID computability.