The Kensington VeriMark Guard Fingerprint Security Key (manufacturer product ID: K64708WW) is not natively compatible with Linux, including Ubuntu. The device is primarily designed for use with Windows and does not have official support for Linux operating systems.

While some users have attempted to use similar devices on Linux through various workarounds and configuration changes, there is no guaranteed or straightforward method to make the VeriMark Guard work seamlessly on Linux platforms. The device's proprietary encryption algorithms and lack of documentation from the manufacturer make it challenging to achieve reliable compatibility.