Using contour marking bytecode verification algorithm on the java']java card

Java bytecode verification could not be well performed in the smart card due to the resource usage especially in the resource-constrained devices. Currently, on the card there are several bytecode verifications which exist kinds of problems, in order to be better and be better adapt to the environment, such as a smart card platform, raised using the contour subroutine labeled bytecode verification algorithm on a card. First, through the analysis of existing card byte code verification algorithm to determine the imperfections and difficulties in the judgment and the verification of subroutine, and then propose a method for marking the subroutine in the place of the jump to it. Thus not only get the program structure and enhance the effectiveness and efficiency of the validation. The feasibility of the method is demonstrated by simulating typical examples verification.