![]() Each password can be used only one time, thus the name "one time password" or "OTP." When you log into an MFA-enabled system, you will enter your NERSC password followed by the OTP displayed on your authenticator app. The authenticator presents a 6-digit password that changes every 30 seconds. MFA at NERSC makes use of an app that you install on your mobile device, which you configure through Iris (If you do not have an iOS or Android mobile device, see below for alternatives). As the name implies, you can use an OTP only once. With NERSC's MFA, you authenticate using your NERSC password plus a "one-time password" (OTP). MFA provides greater protection than regular passwords against phishing and other modern threats to your digital security. NERSC users are required to use Multi-Factor Authentication ( MFA) for logging into NERSC resources. Multi-Factor Authentication (MFA) ¶ Introduction ¶ (Q) Can I access 3rd party hosts from NERSC with my personal ssh keys?.(Q) How can I use a tool that requires authentication to a NERSC host?.(Q) What if a NERSC resource doesn't support MFA yet?.(Q) We are running automated jobs on NERSC machines.(Q) Can I use the same OTP to login to multiple resources?.(Q) MFA is enabled for my account but I didn't set a MFA token on an authenticator app.How do I copy or transfer my token from one to the other? (Q) Can I use OTPs generated on a device with clock drift?.(Q) I don't have a smartphone or tablet.sshproxy on Unix-like Systems (macOS, Cygwin and Windows Subsystem for Linux included).Multi-Factor Authentication Multi-Factor Authentication Table of contents.It is important that the second factor is something that only you have. Two-factor authentication is still valid regardless of whether the second authentication factor comes from your mobile device, tablet, or desktop app. When using Authy on the desktop, is that considered two-factor authentication?.Keep in mind that you may need to enable multi-device on your existing device(s) manually. We encourage this because if you lose access to one device, you will have another app to log into your applications. Can I install Authy Desktop on more than one computer?.Find more details on installing Authy for Linux on the Authy app page on Snapcraft. ![]() Head to this page for more information on system requirements. While other distributions may work, Authy has not been tested on them as of this publication.
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