Abstract: The invention relates to a method for providing a computerized system which is protected from unauthorized programs coming from an external source, the method comprises the steps of (a) secretly, and in a manner unknown to authors of external programs, providing a non-standard compiler which mutates (modifies) each high level program to one or more non-standard mutated machine code instructions that a standard CPU cannot properly execute! (b) subjecting all authorized programs to said non-standard compiler; and (c) providing a translator which converts each mutated machine code instruction resulting from said non-standard compiler to a respective standard instruction which the CPU can properly execute, whereas any program which is not subjected to both said non-standard compiler and said translator will result in one or more instructions that the CPU cannot properly execute.

Abstract: The invention relates to a method for providing a computerized system which is protected from unauthorized programs coming from an external source, the method comprises the steps of (a) secretly, and in a manner unknown to authors of external programs, providing a non-standard compiler which mutates (modifies) each high level program to one or more non-standard mutated machine code instructions that a standard CPU cannot properly execute! (b) subjecting all authorized programs to said non-standard compiler; and (c) providing a translator which converts each mutated machine code instruction resulting from said non-standard compiler to a respective standard instruction which the CPU can properly execute, whereas any program which is not subjected to both said non-standard compiler and said translator will result in one or more instructions that the CPU cannot properly execute.

Abstract: The invention relates to a method for providing a computerized system which is protected from malicious programs coming from an external source, the method comprises the steps of (a) secretly, and in a manner unknown to authors of external programs, modifying one or more essential elements at the protected system in a manner which causes all running programs to fail, unless they are subjected to a compatible modification which enables them to run properly; and (b) modifying each program at the computerized system which is known to be benign in order to comply with said modification of one or more essential elements, thereby to enable it to be executed properly.

Abstract: The invention relates to a method for providing a computerized system which is protected from malicious programs coming from an external source, the method comprises the steps of (a) secretly, and in a manner unknown to authors of external programs, modifying one or more essential elements at the protected system in a manner which causes all running programs to fail, unless they are subjected to a compatible modification which enables them to run properly; and (b) modifying each program at the computerized system which is known to be benign in order to comply with said modification of one or more essential elements, thereby to enable it to be executed properly.