VKSP: Variable Key Security Protocol (VKSP) Software Library

This code-efficient, time-based algorithm has the benefit of not requiring resynchronization, for example, if the key fob button is pressed many times when out of range of the receiver.

• Very secure protocol with a 128-bit key
• Re-synchronization is not required
• Encryption algorithm is user selectable
• Its modularity and state machine oriented design allows the integration and co-existence of the receiver
• library with other complex modules
• Flexibility, regardless of which microcontroller is used
• Re-use of already developed modules, such as memory drivers and proprietary encryption algorithms

• Increased security with a 128-bit key authentication
• System doesn’t require any kind of count resynchronization
• Time-based variable key
• 254 different commands can be implemented
• Is possible to use a different encryption algorithm for code or execution time reduction

• Layer/interfaces design on both the receiver and transmitter provides user flexibility with different non-volatile memory and encryption drivers
• Receiver is designed as a state machine system, which eases the integration and interaction with other applications