Best practices for securing accounts

About this guide

This guide describes the highest impact changes you can make to increase account security. Each section outlines a change you can make to your processes to improve the security. The highest impact changes are listed first.

What's the risk?

Account security is fundamental to the security of your supply chain. If an attacker can take over your account on GitHub, they can then make malicious changes to your code or build process. So your first goal should be to make it difficult for someone to take over your account and the accounts of other members of your organization or enterprise.

Centralize authentication

If you're an enterprise or organization owner, you can configure centralized authentication with SAML. While you can add or remove members manually, it's simpler and more secure to set up single sign-on (SSO) and SCIM between GitHub and your SAML identity provider (IdP). This also simplifies the authentication process for all members of your enterprise.

You can configure SAML authentication for an enterprise or organization account. With SAML, you can grant access to the personal accounts of members of your enterprise or organization on GitHub through your IdP, or you can create and control the accounts that belong to your enterprise by using Enterprise Managed Users. For more information, see Conceitos básicos de gerenciamento de identidade e acesso.

After you configure SAML authentication, when members request access to your resources, they'll be directed to your SSO flow to ensure they are still recognized by your IdP. If they are unrecognized, their request is declined.

Some IdPs support a protocol called SCIM, which can automatically provision or deprovision access on GitHub when you make changes on your IdP. With SCIM, you can simplify administration as your team grows, and you can quickly revoke access to accounts. SCIM is available for individual organizations on GitHub Enterprise, or for enterprises that use Enterprise Managed Users. For more information, see Sobre o SCIM para organizações.

Configure two-factor authentication

The best way to improve the security of your accounts is to configure two-factor authentication (2FA). Passwords by themselves can be compromised by being guessable, by being reused on another site that's been compromised, or by social engineering, like phishing. 2FA makes it much more difficult for your accounts to be compromised, even if an attacker has your password.

As a best practice, to ensure both security and reliable access to your account, you should always have at least two second-factor credentials registered on your account. Extra credentials ensures that even if you lose access to one credential, you won't be locked out of your account.

Additionally, you should prefer passkeys and security keys over authenticator apps (called TOTP apps) and avoid use of SMS whenever possible. Both SMS-based 2FA and TOTP apps are vulnerable to phishing, and do not provide the same level of protection as passkeys and security keys. SMS is no longer recommended under the NIST 800-63B digital identity guidelines.

If service accounts in your organization have been selected for 2FA enrollment by GitHub, their tokens and keys will continue to work after the deadline without interruption. Only access to GitHub through the website UI will be blocked until the account has enabled 2FA. We recommend setting up TOTP as the second factor for service accounts, and storing the TOTP secret exposed during setup in your company's shared password manager, with access to the secrets controlled through SSO.

If you're an enterprise owner, you may be able to configure a policy to require 2FA for all organizations owned by your enterprise.

If you're an organization owner, then you may be able to require that all members of the organization enable 2FA.

To learn more about enabling 2FA on your own account, see Configurar a autenticação de dois fatores. To learn more about requiring 2FA in your organization, see Exigindo a autenticação de dois fatores na sua organização.

Configure your enterprise account

Enterprise owners may be able to require 2FA for all members of the enterprise. The availability of 2FA policies on GitHub depends on how members authenticate to access your enterprise's resources.

If your enterprise uses Enterprise Managed Users or SAML authentication is enforced for your enterprise, you cannot configure 2FA on GitHub. Someone with administrative access to your IdP must configure 2FA for the IdP.

For more information, see Sobre SAML para IAM empresarial and Aplicando políticas para configurações de segurança na sua empresa.

Configure your personal account

GitHub supports several options for 2FA, and while any of them is better than nothing, the most secure option is a WebAuthn credential. WebAuthn requires an authenticator such as a FIDO2 hardware security key, a platform authenticator like Windows Hello, an Apple or Google phone, or a password manager. It's possible, although difficult, to phish other forms of 2FA (for example, someone asking you to read them your 6 digit one-time password). However WebAuthn is much more resistant to phishing, because domain scoping is built into the protocol, which prevents credentials from a website impersonating the login page from being used on GitHub.

When you set up 2FA, you should always download the recovery codes and set up more than one 2FA credential. This ensures that access to your account doesn't depend on a single device. For more information, see Configurar a autenticação de dois fatores and Configurar métodos de recuperação da autenticação de dois fatores.

Configure your organization account

If you're an organization owner, you can see which users don't have 2FA enabled, help them get set up, and then require 2FA for your organization. To guide you through that process, see:

1. Ver se os usuários da organização habilitaram a 2FA
2. Preparar para exigir autenticação de dois fatores na organização
3. Exigindo a autenticação de dois fatores na sua organização

Connect to GitHub using SSH keys

There are other ways to interact with GitHub beyond signing into the website. Many people authorize the code they push to GitHub with an SSH private key. For more information, see Sobre o SSH.

Just like your account password, if an attacker were able to get your SSH private key, they could impersonate you and push malicious code to any repository you have write access for. If you store your SSH private key on a disk drive, it's a good idea to protect it with a passphrase. For more information, see Trabalhar com frase secreta da chave SSH.

Another option is to generate SSH keys on a hardware security key. You could use the same key you're using for 2FA. Hardware security keys are very difficult to compromise remotely, because the private SSH key remains on the hardware, and is not directly accessible from software. For more information, see Gerando uma nova chave SSH e adicionando-a ao agente SSH.

Hardware-backed SSH keys are quite secure, but the hardware requirement might not work for some organizations. An alternative approach is to use SSH keys that are only valid for a short period of time, so even if the private key is compromised it can't be exploited for very long. This is the concept behind running your own SSH certificate authority. While this approach gives you a lot of control over how users authenticate, it also comes with the responsibility of maintaining an SSH certificate authority yourself. For more information, see Sobre autoridades certificadas de SSH.

Next steps

• Securing your end-to-end supply chain
• Best practices for securing code in your supply chain
• Best practices for securing your build system
• Melhores práticas para evitar vazamentos de dados na sua organização