This method is based on the use of special Guardant API functions located in object modules. API functions provide for performing any operations with a dongle: search, reading and writing into is memory, setting of hardware locks, encryption of data using the hardware algorithms, etc. To setup protection using this method you need to embed calls of API functions into the source code of the application and compile them with the object modules.
The main advantage of this method is that it provides an immeasurably higher level of protection. The protection (if implemented correctly) becomes integrated into the application, which makes it hard to remove by a hacker. Guardant API functions serve for performing any operation with a dongle, they can process any accessible area of its memory – in other words, the possibilities of developing protection are limited only by the developer’s fantasy and abilities. You can build any, even highly dedicated logic of protection in order to significantly complicate the hacker’s task in breaking it. Finally, only Guardant API functions provide a complete freedom of actions while working with dongle hardware algorithms.
The creating of protection build on Guardant API is a task assuming a range of various solutions. Therefore, it is impossible to offer a universal and detailed step-by-step process description for such protection. Below you will find a generic action plan that you should be guided by in any case:
- Study the test examples of programs written in respective program-ming language (see Folder “C:\Program Files\Guardant\SDK7\Samples”). The tests contain examples of using the main API functions
- Develop you own protection system using the acquired knowledge and recommendations described in Appendix on Increasing Tamperproofness of Protection