Password Management and Firmware Updates

The Password Problem in Smart Homes

The average smart home owner has accounts with a dozen or more device manufacturers: one for their lights, another for their thermostat, another for their cameras, another for their lock, and so on. Each account requires a username and password. Human nature being what it is, most people either reuse the same password across all these accounts or use simple variations that are easy to guess.

This is extremely dangerous because of a technique called credential stuffing. When a data breach exposes passwords from one service (and breaches happen constantly), attackers automatically try those same email and password combinations on hundreds of other services. If you used the same password for your email, your social media, and your smart lock account, a breach at any one of them compromises all three. Suddenly, someone has the ability to remotely unlock your front door.

Using a Password Manager

A password manager is the single most effective security tool you can use. It generates, stores, and automatically fills unique, complex passwords for every account. You only need to remember one master password, and the manager handles everything else.

Here is how to set one up for your smart home accounts:

1. Choose a password manager. Good options include 1Password, Bitwarden (open source and has a free tier), and Apple Keychain if you are in the Apple ecosystem. All of these are reputable and well-audited.
2. Create a strong master password. This is the one password you need to memorize. Make it a passphrase of four or more random words, at least 20 characters total. Something like "purple-elephant-sings-Tuesday" is both strong and memorable.
3. Enable two-factor authentication on the password manager itself. Use an authenticator app (like Google Authenticator or Authy) rather than SMS, as SMS-based 2FA can be bypassed through SIM swapping.
4. Start migrating accounts. Go through each smart home app, log in, change the password to a randomly generated one from your password manager, and save it. Each password should be at least 20 characters of random characters. You do not need to remember them since the password manager does that for you.

Two-Factor Authentication Everywhere

Enable two-factor authentication (2FA) on every smart home account that supports it. This means that even if someone obtains your password, they also need a second piece of verification, typically a code from an authenticator app, to gain access. Prioritize enabling 2FA on these accounts first:

• Your primary smart home platform (Apple, Google, Amazon, or Samsung account)
• Your security camera account (Ring, Arlo, Wyze, etc.)
• Your smart lock account (Yale, Schlage, August, etc.)
• Your email account (since password resets are sent here)

Use an authenticator app rather than SMS whenever possible. If you lose your phone, make sure you have backed up your 2FA recovery codes in your password manager or in a secure physical location.

Firmware Updates: Your Ongoing Defense

Firmware updates are how manufacturers fix security vulnerabilities after they are discovered. A device with outdated firmware is like a house with a broken lock: the vulnerability is known and documented, and attackers actively scan for unpatched devices.

Here is how to stay on top of firmware updates across your smart home:

Enable automatic updates wherever possible. Most modern smart home devices and apps offer an auto-update setting. Turn it on. The minor inconvenience of occasional brief device downtime during updates is far better than running vulnerable firmware.

Create a monthly update checklist. For devices that do not update automatically, set a monthly reminder to check for updates. Open each smart home app, navigate to the device settings, and check for firmware updates. Common places to find update options include the device's settings page in the app, the app's main settings under "Device updates" or "Firmware," and the manufacturer's website for manual firmware downloads.

Replace unsupported devices. If a manufacturer goes out of business or stops releasing updates for your device, it is time to replace it. An abandoned device will accumulate unpatched vulnerabilities over time. This is particularly important for security-critical devices like cameras, locks, and alarm systems.

Managing Shared Access Securely

Smart home devices are often shared with family members, houseguests, or service providers. Here are some best practices for managing shared access:

• Use built-in sharing features rather than sharing your password. Most smart home platforms allow you to invite family members with their own accounts and control what they can access.
• Create temporary access codes for smart locks rather than giving out the master code. Many smart locks allow you to create time-limited codes for houseguests, dog walkers, or cleaners that automatically expire.
• Review shared access regularly. When someone no longer needs access, like a houseguest who has left or a cleaner you no longer use, remove their access promptly.
• Never share your primary account credentials. Each person should have their own account, even family members. This provides an audit trail and allows you to revoke individual access without disrupting everyone else.