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A file with activation key that needs to be installed in same directory as software; similarly, a disc media (often installation disc) may be required as key disk for activation. [1] Code Morphing Hiding intermediate code by means of code obfuscation so that execution logic is not visible. This method does not protect against runtime tracing. [2]
Secure USB flash drives protect the data stored on them from access by unauthorized users. USB flash drive products have been on the market since 2000, and their use is increasing exponentially. [1] [2] As businesses have increased demand for these drives, manufacturers are producing faster devices with greater data storage capacities.
There are potential weaknesses in the implementation of the protocol between the dongle and the copy-controlled software. For example, a simple implementation might define a function to check for the dongle's presence, returning "true" or "false" accordingly, but the dongle requirement can be easily circumvented by modifying the software to always answer "true".
USB flash drives sometimes have a small switch, though this has become uncommon. An example of a USB flash drive that supported write protection via a switch is the Transcend JetFlash series. Secure Digital (SD) cards have a write-protect tab on the left side. Extensively, media that, by means of design, can't operate outside from this mode: CD ...
The most common form, only available when using a full-size SD card, provides a physical write protection switch which allows the user to advise the host card reader to disallow write access. This does not protect the data on the card if the card reader hardware is not built to respect the write protection switch. [2]
Wavy data track [2] Discs' data track is wavy instead of straight, so only discs with the same wavy-shaped data track will be playable. Extended Copy Protection (XCP) Installs software on the computer after agreement to EULA at the first time the media is inserted, and the software will watch for any ripper software trying to access the CD-drive.
Various tools or technological protection measures (TPM), [1] such as access control technologies, can restrict the use of proprietary hardware and copyrighted works. [2] DRM technologies govern the use, modification and distribution of copyrighted works (e.g. software, multimedia content) and of systems that enforce these policies within ...
A software license is a legal instrument that governs the usage and distribution of computer software. [1] Often, such licenses are enforced by implementing in the software a product activation or digital rights management (DRM) mechanism, [2] seeking to prevent unauthorized use of the software by issuing a code sequence that must be entered into the application when prompted or stored in its ...