![]() These offer the same credential support as touch or plug-in OTP+PKI authenticators, but supply codes or credentials wirelessly, using either near-field communication (NFC) or low energy Bluetooth (BLE). That opens the door to far longer OTP codes along with the management and use of public key infrastructure (PKI) and other extended credentials. Rather than displaying codes, these authenticators type them for you, via USB. ![]() In most cases, the user must manually enter this code at the login prompt. ![]() These tokens display a short, rotating one-time password (OTP) on a small screen. Still, look deeper and it becomes clear that there are just three major kinds of tokens on the market: ![]() Yet the hardware token landscape can seem confusing-particularly given its mix-and-match nature in terms of features and form factors. At their best, hardware tokens offer an alternative to the particular security, convenience, privacy, and cost issues that accompany phone-based multi-factor authentication. ![]()
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