ACS PocketKey+ is a hardware security key that provides passwordless authentication and multi-factor authentication capabilities. The device is FIDO Alliance certified and compliant with FIDO U2F and FIDO2 CTAP2.1 protocols. The security key uses a cryptographic security model to prevent phishing, password theft, identity theft, and replay attacks. It stores FIDO cryptographic keys on the device and generates unique keys for each website to prevent user tracking. The device features a USB Type-C connector with NFC functionality and includes a mechanical switch for user presence validation. It uses ECC p256 cryptographic specification and includes a blue LED indicator. PocketKey+ is compatible with Windows, Linux, macOS, Android, and iOS operating systems. It supports major web browsers including Chrome, Safari, Microsoft Edge, and Firefox. The device can be used for authentication on platforms such as Microsoft, Apple ID, iCloud, Facebook, and Google. The device supports enterprise attestation upon request and includes TOTP/HOTP functionality. It can be managed using the ACS FIDO Key Manager software, which is available for Windows and macOS. The device is certified to FIDO2 L1 and FIDO U2F standards and complies with CE, UKCA, FCC, RoHS, and REACH regulations.