Crescendo key series brings form factors and capabilities to enable seamless and trusted authentication. This hardware authenticator provides strong security - utilizing Near Field Communications (NFC) and USB-C port with the same two-factor authentication, digital and encryption capabilities of a smart card. The Crescendo key series small footprint is particularly convenient when used with tablets and ultrabooks since it is nearly flush with the device casing. Thanks to its convenient USB interface, workstations and laptops do not require additional readers, so IT operational costs are reduced. The Crescendo key series is a platform for strong authentication apps, so it creates a tool that is more valuable than the sum of its parts by bringing together high standards, excellent user experience, and various compliance capabilities into one device.