Abstract: Disposable Hidden Codes DHCs (42) for verification of identity are a plurality of codes (42) randomly selected and sequentially stored in a control center database and linked to an account number (30). A copy of said codes then printed on a card (20) at the same sequential order and hidden under an easy to remove coverer (24). Each account number (28) is to represent one user (32) only. A reliable source (22) such as a bank or governmental agency, after positive identification of a user (32), provides an identification code by which said user (32) is identified in a country, such as Social Security Number in the United States of America, to a DHC control center. The control center assigns an account number (28) for that identification code and provides the DHC card (20) linked to that account number (28) to the reliable source (22) to give to that user (32). To verify said user's (32) identity, said user (32) uncovers the next code (42) and provides it with the account number (28).

Abstract: A Turbocombustion engine for conversation of combustible fuel to rotating energy includes a cylinder, piston, connecting rod and crankshaft system for suction and compression and a rotor for expansion and exhaust. Combustible fuel is compressed within a combustion chamber separate from the cylinder and the combustion force applied directly to the rim of the rotor as in turbines with much larger capacity than the cylinder, converting the entire combustion force at maximum torque to rotating energy. The combustion chamber also includes a variable compression ratio system that constantly adjusts the compression ratio within the combustion chamber for optimum performance of the engine under all variables.