What service is provided as an integrated Snowflake feature to enhance Multi-Factor Authentication (MFA) support?

Snowflake's native Multi-Factor Authentication (MFA) feature is implemented through a direct, built-in integration with the Duo Security service. This integration allows users to enhance their login security by providing a second factor of authentication. When MFA is enabled for a user, Snowflake leverages Duo to facilitate authentication methods such as Duo Push notifications, Time-based One-Time Passwords (TOTP), and SMS passcodes. This is a distinct feature from federated authentication or Single Sign-On (SSO) and is managed directly within Snowflake user properties.

B. OAuth: OAuth is an open standard for access delegation, commonly used to grant websites or applications access to information on other websites without giving them the passwords. It is an authorization framework, not an MFA service.
C. Okta: Okta is an Identity Provider (IdP) that can be configured for federated authentication and Single Sign-On (SSO) with Snowflake. While Okta provides its own MFA, it operates as part of an SSO solution, which is an alternative to Snowflake's native authentication, not an enhancement to it.
D. Single Sign-On (SSO): SSO is an authentication scheme that allows a user to log in with a single set of credentials to multiple independent software systems. It is a method of authentication, not a specific service that enhances Snowflake's built-in MFA.

1. Snowflake Documentation: Multi-factor Authentication (MFA).

Section: Overview of Multi-factor Authentication (MFA)

Quote: "To provide more authentication security

Snowflake supports multi-factor authentication (MFA). Snowflake uses the Duo Security service to provide MFA

which can be enabled for individual users."

2. Snowflake Documentation: Managing Multi-factor Authentication (MFA).

Section: Enabling MFA for Your User Account

Quote: "After your account administrator enables MFA for your user

you must enroll in MFA through the web interface. Snowflake’s built-in integration with Duo Security allows using Duo Push

TOTP passcodes

and SMS passcodes for the second factor of authentication."