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Update identity-enable-qrcodes.md (#5323)

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Rick Anderson 2018-02-02 11:49:45 -10:00 committed by GitHub
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aspnetcore/security/authentication/identity-enable-qrcodes.md
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@ -83,8 +83,6 @@ The correctly formatted URL for the QR Code is available in the:
* `AuthenticatorUri` property of the model.
* `data-url` property in the `qrCodeData` element.
Use `@Html.Raw` to access the model property in a view (otherwise the ampersands in the url will be double encoded and the label parameter of the QR Code will be ignored).
## TOTP client and server time skew
TOTP authentication depends on both the server and authenticator device having an accurate time. Tokens only last for 30 seconds. If TOTP 2FA logins are failing, check that the server time is accurate, and preferably synchronized to an accurate NTP service.