Supercell Oy

Aki Immonen

A method for blocking external debugger application from analysing code of software program installed on computing device. The method including initializing software program including an application program and an internal debugger application. The software program, upon initialization thereof, instructs internal debugger application to load application program in internal debugger application. The internal debugger application is configured to utilize kernel resources of an operating system of the computing device. The method includes executing internal debugger application to set one or more break-points in code of application program to define execution path for code of application program, executing application program as per defined execution path for code thereof, stopping execution of code of application program upon reaching any of one or more break-points therein, and handing control to internal debugger application to provide an address for next instruction to be executed in defined execution path for code of application program.

Method for blocking external debugger application from analysing code of software program

A method for detection of tampering in an executable code including one or more code blocks. The method includes monitoring execution of the executable code with a call stack data structure associated therewith, the execution involving accessing one or more address spaces; receiving information about the one or more address spaces, as accessed; comparing the received information about one or more accessed address spaces with information about one or more allowed address spaces defined in the call stack data structure of the executable code; raising a flag upon detection that the one or more accessed address spaces are different from the one or more allowed address spaces, based on the comparison; and executing an action based on the raised flag.

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Espoo, Finland

Aki Immonen