InputStick supports AES-128 (CBC mode) encryption on a protocol level. This is as good as what top-class wireless keyboards offer. Additionally it is possible to manually change encryption key.
InputStick can be password protected to prevent potential attackers from using it as a wireless keyboard to access your PC.
InputStick uses USB HID class only - it can be used to type text, move mouse pointer, but it can NOT be used to access your files or the Internet.