Abstract: The invention relates to a method for protecting a computer program from being influenced by an invasive program or by manipulation software for manipulating computer programs on a computer system comprising a processor, a main storage unit, and a storage medium. The method involves the Kerckhoffs's principle such that the protected computer program is freely accessible and can be read by an invasive program or manipulation software. Parts of the protected computer program are provided multiple times in the program code of the protected computer program as a result of the specialization of the computer program. Parts of the computer program are encrypted in order to prevent a statistical analysis of the computer program without the processor running the computer program, wherein a key which is required to decrypt the encrypted parts of the computer program is stored in a protected key storage unit which communicates with the computer.

Abstract: The invention relates to a method for protecting a computer program from being influenced by an invasive program or by manipulation software for manipulating computer programs on a computer system comprising a processor, a main storage unit, and a storage medium. The method involves the Kerckhoffs's principle such that the protected computer program is freely accessible and can be read by an invasive program or manipulation software. Parts of the protected computer program are provided multiple times in the program code of the protected computer program as a result of the specialization of the computer program. Parts of the computer program are encrypted in order to prevent a statistical analysis of the computer program without the processor running the computer program, wherein a key which is required to decrypt the encrypted parts of the computer program is stored in a protected key storage unit which communicates with the computer.

Abstract: A Method for protecting an application program executable on a computer against reverse engineering, said application is created to run with at least one selected dynamic link library (DLL) on said computer, comprises the steps of: adding a specific library loader to the executable application program, said loader either contains or has access to said dynamic link library; setting modified references to said dynamic link library such that upon loading said application program and said loader into the main memory of said computer, said dynamic link library is initialized by said library loader instead of the operating system; The library loader and the pseudo-statically linked library could be embedded into the application program, thereby using unused space within the application. The protected application presents itself as a monolithic application without the vulnerable interface to a DLL.

Abstract: A Method for protecting an application program executable on a computer against reverse engineering, said application is created to run with at least one selected dynamic link library (DLL) on said computer, comprises the steps of: adding a specific library loader to the executable application program, said loader either contains or has access to said dynamic link library; setting modified references to said dynamic link library such that upon loading said application program and said loader into the main memory of said computer, said dynamic link library is initialized by said library loader instead of the operating system; The library loader and the pseudo-statically linked library could be embedded into the application program, thereby using unused space within the application. The protected application presents itself as a monolithic application without the vulnerable interface to a DLL.

Abstract: A method for coupling protected digital data object, for example an application program, and a specified computer, which allows for, if desired, individual components of the computer to be modified. A cryptographic key is generated on the basis of current components of a computer in order to decrypt an encrypted, computer-specific authorization code for executing a protected digital data object on the computer. The computer-specific authorization code is encrypted with a key based on original components of the computer. The key can be determined from the current components of the computer even if they are different from the original components of the computer.

Abstract: Method for protecting computer software by detecting an attack of an intruding program interfering with the execution of said protected software on a computer system with a processor and at least a processor memory, wherein the computer software to be protected communicates with a license container containing a license for using and executing the protected computer software and containing at least one cryptographic key, wherein the license container provides licenses and cryptographic keys for the protected software to protect its usage and its integrity, and wherein the protected computer software is at least partly encrypted and uses the associated cryptographic keys to decrypt said protected software for executing comprises the following steps: during execution of the protected software, analyzing the behavior of the protected software and/or the execution environment of the protected software on the computer system, and searching for patterns of an intrusion or an intruding program, detecting an intrusion

Abstract: A method for coupling protected digital data object, for example an application program, and a specified computer, which allows for, if desired, individual components of the computer to be modified. A cryptographic key is generated on the basis of current components of a computer in order to decrypt an encrypted, computer-specific authorization code for executing a protected digital data object on the computer. The computer-specific authorization code is encrypted with a key based on original components of the computer. The key can be determined from the current components of the computer even if they are different from the original components of the computer.

Abstract: Method for protecting computer software by detecting an attack of an intruding program interfering with the execution of said protected software on a computer system with a processor and at least a processor memory, wherein the computer software to be protected communicates with a license container containing a license for using and executing the protected computer software and containing at least one cryptographic key, wherein the license container provides licenses and cryptographic keys for the protected software to protect its usage and its integrity, and wherein the protected computer software is at least partly encrypted and uses the associated cryptographic keys to decrypt said protected software for executing comprises the following steps: during execution of the protected software, analyzing the behavior of the protected software and/or the execution environment of the protected software on the computer system, and searching for patterns of an intrusion or an intruding program, detecting an intrusion