Yubico - YubiKey NEO - USB-A, NFC, Two-Factor Authentication Protect online accounts against unauthorized access by using two factor authentication with this security key. Works with Gmail, Facebook, Dropbox, Twitter, Dashlane, LastPass and hundreds of other services Durable, waterproof, and crush resistant Touch based authentication for NFC supported Android and iOS devices and applications. Fits USB-A computer ports and designed to fit on your keychain Multi-protocol support: FIDO U2F, Yubico OTP, OATH-TOTP, OATH-HOTP, Smart card (PIV), OpenPGP, Challenge-Response; Made in USA Strong two-factor hardware based authentication Easy and fast authentication with a single touch or tap to NFC enabled device Reduces IT operational costs Crush resistant &amp; waterproof Multiprotocol support on a single key Made in the USA &amp; Sweden Supported protocols: FIDO U2F, smart card (PIV), Yubico OTP, OpenPGP, OATH-TOTP, OATH-HOTP, and Challenge-Response Secure element hardware to protect cryptographic keys Crypto Algorithms: RSA 2048 and ECC p256 Interface: USB-A and NFC Works on Microsoft Windows, Mac OS X, Linux, Chrome OS operating systems, and on major browsers Now works with Twitter! Learn more PIV smart card compatible, minidriver available on Windows Support for PKCS#11 Size: 18mm x 45mm x 3.3mm, 3g Weight: 3G