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Hugo Build Signed-off-by: Tommy <contact@tommytran.io>
2022-07-16 19:53:12 -04:00
<!doctype html><html lang=en dir=auto><head><meta charset=utf-8><meta http-equiv=x-ua-compatible content="IE=edge"><meta name=viewport content="width=device-width,initial-scale=1,shrink-to-fit=no"><meta name=robots content="index, follow"><title>Multi-factor Authentication | PrivSec.dev</title><meta name=keywords content="knowledge base,security"><meta name=description content="Multi-factor authentication is a security mechanism that requires additional verification beyond your username (or email) and password. This usually comes in the form of a one time passcode, a push notification, or plugging in and tapping a hardware security key.
Common protocols Email and SMS MFA Email and SMS MFA are examples of the weaker MFA protocols. Email MFA is not great as whoever controls your email account can typically both reset your password and recieve your MFA verification."><meta name=author content="Tommy"><link rel=canonical href=https://privsec.dev/knowledge/multi-factor-authentication/><link crossorigin=anonymous href=/assets/css/stylesheet.8b523f1730c922e314350296d83fd666efa16519ca136320a93df674d00b6325.css integrity="sha256-i1I/FzDJIuMUNQKW2D/WZu+hZRnKE2MgqT32dNALYyU=" rel="preload stylesheet" as=style><script defer crossorigin=anonymous src=/assets/js/highlight.f413e19d0714851f6474e7ee9632408e58ac146fbdbe62747134bea2fa3415e0.js integrity="sha256-9BPhnQcUhR9kdOfuljJAjlisFG+9vmJ0cTS+ovo0FeA=" onload=hljs.initHighlightingOnLoad()></script>
<link rel=icon href=https://privsec.dev/%3Clink%20/%20abs%20url%3E><link rel=icon type=image/png sizes=16x16 href=https://privsec.dev/%3Clink%20/%20abs%20url%3E><link rel=icon type=image/png sizes=32x32 href=https://privsec.dev/%3Clink%20/%20abs%20url%3E><link rel=apple-touch-icon href=https://privsec.dev/%3Clink%20/%20abs%20url%3E><link rel=mask-icon href=https://privsec.dev/%3Clink%20/%20abs%20url%3E><meta name=theme-color content="#2e2e33"><meta name=msapplication-TileColor content="#2e2e33"><noscript><style>#theme-toggle,.top-link{display:none}</style></noscript><meta property="og:title" content="Multi-factor Authentication"><meta property="og:description" content="Multi-factor authentication is a security mechanism that requires additional verification beyond your username (or email) and password. This usually comes in the form of a one time passcode, a push notification, or plugging in and tapping a hardware security key.
Common protocols Email and SMS MFA Email and SMS MFA are examples of the weaker MFA protocols. Email MFA is not great as whoever controls your email account can typically both reset your password and recieve your MFA verification."><meta property="og:type" content="article"><meta property="og:url" content="https://privsec.dev/knowledge/multi-factor-authentication/"><meta property="article:section" content="knowledge"><meta name=twitter:card content="summary"><meta name=twitter:title content="Multi-factor Authentication"><meta name=twitter:description content="Multi-factor authentication is a security mechanism that requires additional verification beyond your username (or email) and password. This usually comes in the form of a one time passcode, a push notification, or plugging in and tapping a hardware security key.
Common protocols Email and SMS MFA Email and SMS MFA are examples of the weaker MFA protocols. Email MFA is not great as whoever controls your email account can typically both reset your password and recieve your MFA verification."><script type=application/ld+json>{"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":2,"name":"Knowledge Base","item":"https://privsec.dev/knowledge/"},{"@type":"ListItem","position":3,"name":"Multi-factor Authentication","item":"https://privsec.dev/knowledge/multi-factor-authentication/"}]}</script><script type=application/ld+json>{"@context":"https://schema.org","@type":"BlogPosting","headline":"Multi-factor Authentication","name":"Multi-factor Authentication","description":"Multi-factor authentication is a security mechanism that requires additional verification beyond your username (or email) and password. This usually comes in the form of a one time passcode, a push notification, or plugging in and tapping a hardware security key.\nCommon protocols Email and SMS MFA Email and SMS MFA are examples of the weaker MFA protocols. Email MFA is not great as whoever controls your email account can typically both reset your password and recieve your MFA verification.","keywords":["knowledge base","security"],"articleBody":"Multi-factor authentication is a security mechanism that requires additional verification beyond your username (or email) and password. This usually comes in the form of a one time passcode, a push notification, or plugging in and tapping a hardware security key.\nCommon protocols Email and SMS MFA Email and SMS MFA are examples of the weaker MFA protocols. Email MFA is not great as whoever controls your email account can typically both reset your password and recieve your MFA verification. SMS on the other hand is problematic due to the lack of any kind of encryption, making it vulnerable to sniffing. Sim swap attacks, if carried out successfully, will allow an attacker to recieve your one time passcode while locking you out of your own account. In certain cases,websites or services may also allow the user to reset their account login by calling them using the phone number used for MFA, which could be faked with a spoofed CallerID.\nOnly use these protocols when it is the only option you have, and be very careful with SMS MFA as it could actually worsen your security.\nPush Confirmations Push confirmation MFA is typically a notification being sent to an app on your phone asking you to confirm new account logins. This method is a lot better than SMS or email, since an attacker typically wouldn’t be able to get these push notifications without having an already logged-in device.\nPush comfirmation in most cases rely on a third party provider like Duo. This means that trust is placed in a server that neither you nor your service provider control. A malicious push confirmation server could compromise your MFA or profile you based on which website and account you use with the service.\nEven if the push notification application and server is provided by first party as is the case with Microsoft login and Microsoft Authenticator, there is still a risk of you accidentally tapping on the confirmation button.\nTime-based One-time Password (TOTP) TOTP is one of the most common forms of MFA available. When you set up TOTP, you setup a “shared secret” with the service that you intend to use and store it in your authentication app.\nThe time-limited code is then derived from the shared secret and the current time. As the code is only valid for a short time, without access to the shared secret, an adversary cannot generate new codes.\nIf you have a Yubikey, you should store the “shared secrets” on the key itself using the Yubico Authenticator app. After the initial setup, the Yubico Authenticator will only expose the 6 digit code to the machine it is running on, but not the shared secret. Additional security can be set up by requiring touch confirmation, protecting digit codes not in used from a compromised operating system.\n
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