摘要:
The present invention is directed to a system for rendering selective presentation of a document and a method therefor, said system comprising: an encrypting logic, for securely storing the content of said document; a decrypting logic, corresponding to said encrypting logic, for decrypting the encrypted document, wherein at least a part of said decrypting logic is embedded within a first security token; and a selective presentation document viewer, for rendering selective presentation of the decrypted document. Preferably, both, the selective presentation document viewer and the document, are protected by the same security token.
摘要:
A method of adding a copy protection function to a program to be installed on a computer system comprising a copy protection unit is provided, said method comprising the steps of determining a decision section of the program, wherein information influencing the further course of the program is defined during execution of the program, as a function of the current running state of the program, and converting the decision section by means of code which is executable exclusively in the copy protection unit and which is executed in the copy protection unit during execution of the program.
摘要:
A method of executing a program (2) on a computer (3) comprising a main memory (6) divided into pages comprises the steps of:loading a main section (7) of the program comprising a manipulating module into the main memory (6) and executing the main section (7), whose manipulating module (12) effects a manipulation of a first of a plurality of program blocks (8, 9, 10) of the program every time a predetermined page error is generated upon an attempt to access the first program block (8, 9, 10).
摘要:
A method of adding a copy protection function to a program to be installed on a computer system comprising a copy protection unit is provided, said method comprising the steps of determining a decision section of the program, wherein information influencing the further course of the program is defined during execution of the program, as a function of the current running state of the program, and converting the decision section by means of code which is executable exclusively in the copy protection unit and which is executed in the copy protection unit during execution of the program.