![]() ![]() The issuer parameter is recommended, but it can be absent. Also, the issuer parameter and issuer string in label should be equal. The hash algorithm used by the credential. The number of digits in a one-time password (OTP). The counter is only used if the type is HOTP. The counter parameter is required when provisioning HOTP credentials. The period parameter defines a validity period in seconds for the TOTP code. Valid period in secondsĮxamples Without parameters this live authenticator demo with the source code here. ![]() ![]() Note that this specific demo and code is not affiliated with Yubico.The Yubikey ( ) supports three major functions, authentication, signing and encryption. ![]() As far as authentication goes, it supports a list of the following mechanisms.Įach of the above-mentioned protocols has its own set of requirements and is therefore not universally supported everywhere. OTP is probably the simplest, with a one-time password being used, typically as the 2 nd factor. However, it is also the weakest, as it does not mitigate against MITM attacks. E.g., A fake site impersonating a legitimate site can trick the user into entering the OTP and subsequently forwards it to the real site.Īll Yubikey’s by default have manufacture assigned secrets registered with Yubico’s own validation servers. Yubico provides a tool that allows you to re-program the key, giving it a different secret. However, the new secret has to be uploaded to Yubico’s validation servers ( ) otherwise OTP will stop working. Yubikey OTP integrates with a large number of services (e.g., Gmail, LastPass). When a service receives an OTP, it reaches out to Yubico for validation. In the case of Okta, the secrets can be uploaded directly into Okta and validation happens within Okta. FIDO U2FįIDO U2F or U2F for short, mitigates MITM. This method requires the user to register the authenticator (e.g., Yubikey) with the application (e.g., Gmail) first, during which a key pair is generated by the authenticator, and the public key is sent and stored on the application. Once the registration is complete, the user can then use the authenticator as the 2 nd factor. In the case of Gmail, once the user’s credentials are verified, the user touches the Yubikey for 2 nd factor. ![]()
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