![]() ![]() Note however that licenses that have been customized must remain static (for example, such licenses cannot include a decremented number of executions).įor additional information about licensing models, see Licensing Business Models. You can customize your own licenses and still use a ROM segment in a Sentinel protection key’s memory. The different types of available licenses are sufficient for almost any licensing model. Sentinel LDK automatic Feature-based licenses utilize read-only memory of Sentinel protection keys. These segments can only be updated using remote updates. The second segment provides an area in which vendor-customized data can be stored. Sentinel protection keys contain two ROM segments, one of which contains Sentinel LDK Feature-based licenses. In the context of Sentinel LDK, Read-only memory (ROM) is a segment of the memory that can contain data that the protected application can access, but cannot overwrite. For example, a depleted execution-based license might be changed to a perpetual license, or a feature that has not been paid for might be enabled. A software cracker attempts to access the Protection Key memory in order to modify the licensing terms. Licensing data is normally stored in the memory of a software protection key. You can also use the Data Protection facility to encrypt and protect data files that are accessed by protected applications. You can protect multiple executable and DLL files using Sentinel LDK Envelope. The greater the number of protected files, the longer it takes a software cracker to remove protection. The actual file is then patched in order to modify run-time flow, or to remove calls in the code.Ĭommonly, the software cracker sends a small, standalone patch executable that the end user runs in order to patch your software. Patching Executables and DLLsĪ software cracker disassembles and/or debugs EXE or DLL files to find protected code. ![]() This section describes the elements of some of the more common attacks that software crackers use, and refers you to specific Sentinel LDK strategies that you can implement to counter such attacks. It is important to “know your enemy.” When you are well informed about the types of attacks that a software cracker may make, you will be best able to devise and implement strategies that limit or prevent their success. Types of Attack and Their Sentinel LDK Defense ![]()
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