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GoTrust Idem Key - FIDO2 L2 Security Key, USB and NFC Security Key - Two Factor Authentication with USB-A and NFC Interfaces - Works Across a Wide Range of Mobile Devices and
FIDO2 U2F Security Key - U2F USB 2-Step Authentication Security : ID 3363 : $9.95 : Adafruit Industries, Unique & fun DIY electronics and kits
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Amazon.com: FIDO Security Key TrustKey T110 FIDO2 U2F Two Factor Authentication USB Key PIN+Touch (Non-Biometric) USB-A Type : Electronics
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FIDO Security Key T110 FIDO2 U2F Two Factor Authentication USB Key PIN+Touch (Non-Biometric) USB-A Type - Newegg.com