FAST way to login securely

I am looking for a FAST way to login securely to a desktop.  Easy to implement and free are also important requirements.

Easy To Implement
Secure (meets highest-level DOD security requirements)
Cross Platform (Windows, Linux, or Android)
Improves Productivity (no clicks, no remembering to log-out)
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David Johnson, CD, MVPOwnerCommented:
Security and ease of use are diametrically opposed items. Microsoft has made one step forward with the use of PIN's, picture passwords, swipe gestures in the latest versions of their client operating systems.
btanExec ConsultantCommented:
You need to assess your risk appetite. The required secure baseline will already need to have minimally 2 factor authentication, meaning OTP (SMS, SecurID or Mobile Apps like Google Authenticator) or smartcard (PIV)/USB token. OTP has been preferred but not secure than smartcard. Some even went for Multifactor using biometric than may it further fatigue  the user - but Microsoft is striving to improve in the next Windows 10's recent Hello

But I do suggest you consider FIDO (Fast Identity Online) compliant authentication which may be a balance for your FAST requirement. You can take a look at Yubico's touch-sensitive USB key, which uses the FIDO Universal 2FA protocol for authentication. This Yubico matrix will suggest its NEO as preferred choice for a more secure and stay inter-operable across OS and appl

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