How do I set the initial PIN code on the Coldcard Mk4?

Secure your Coldcard Mk4 by setting a strong, unique initial PIN code up to 12 digits long to protect your cryptocurrency assets from unauthorized access.

Apr 06, 2025 at 08:35 am

Setting the initial PIN code on your Coldcard Mk4 is an essential step to secure your cryptocurrency assets. The Coldcard Mk4 is a highly secure hardware wallet designed for storing Bitcoin and other cryptocurrencies offline, making it a popular choice among crypto enthusiasts. To set your initial PIN code, you will need to follow a straightforward process that ensures your device remains protected from unauthorized access. This article will guide you through the steps required to set your initial PIN code on the Coldcard Mk4, ensuring your digital assets are safeguarded.

Understanding the Importance of a PIN Code

Before delving into the steps to set your initial PIN code, it's crucial to understand why this security measure is essential. A PIN code serves as the first line of defense against unauthorized access to your Coldcard Mk4. Without a PIN code, anyone with physical access to your device could potentially gain access to your cryptocurrencies. By setting a strong and unique PIN code, you add an additional layer of security that protects your private keys and, consequently, your digital assets.

Preparing to Set Your Initial PIN Code

Before you begin the process of setting your initial PIN code, ensure that your Coldcard Mk4 is fully charged and that you have a clear understanding of the importance of keeping your PIN code confidential. It's also recommended to choose a PIN code that is easy for you to remember but difficult for others to guess. Avoid using easily guessable numbers such as birthdays or anniversaries. Once you have these preparations in place, you can proceed to set your initial PIN code.

Steps to Set Your Initial PIN Code

To set your initial PIN code on the Coldcard Mk4, follow these steps:

• Turn on your Coldcard Mk4: Press and hold the power button until the device boots up. You will see the Coldcard logo and then the main menu.
• Navigate to the 'Settings' menu: Use the navigation buttons to scroll to the 'Settings' option and press the OK button to enter.
• Select 'PIN Code': Within the 'Settings' menu, scroll to the 'PIN Code' option and press OK.
• Choose 'Set New PIN': You will see options to set a new PIN or change an existing one. Select 'Set New PIN' and press OK.
• Enter your new PIN code: Use the navigation buttons to enter your desired PIN code. The Coldcard Mk4 uses a numeric keypad, so enter your PIN using the numbers 0-9.
• Confirm your new PIN code: After entering your new PIN code, you will be prompted to enter it again to confirm. Ensure that you enter the same PIN code to avoid errors.
• Complete the setup: Once you have successfully entered and confirmed your new PIN code, the Coldcard Mk4 will save it and return you to the main menu. Your initial PIN code is now set.

Verifying Your PIN Code

After setting your initial PIN code, it's important to verify that it works correctly. To do this, turn off your Coldcard Mk4 and then turn it back on. You will be prompted to enter your PIN code to access the device. Enter your PIN code using the navigation buttons, and if it is accepted, you will be granted access to the main menu. If you encounter any issues, double-check that you entered the correct PIN code. If you are still unable to access your device, you may need to reset your PIN code using the recovery process.

Tips for Choosing a Strong PIN Code

Choosing a strong PIN code is crucial for the security of your Coldcard Mk4. Here are some tips to help you select a robust PIN code:

• Use a longer PIN code: The Coldcard Mk4 allows you to set a PIN code up to 12 digits long. A longer PIN code is more difficult to guess or crack.
• Avoid common sequences: Do not use easily guessable sequences such as 1234 or 0000. These are among the first combinations that attackers will try.
• Incorporate randomness: Use a random combination of numbers that is not related to any personal information. You can use a random number generator to help you create a secure PIN code.
• Memorize your PIN code: Do not write down your PIN code or store it in an easily accessible location. Memorize it to ensure that it remains confidential.

Resetting Your PIN Code

If you forget your PIN code or need to change it for any reason, you can reset it using the recovery process. To reset your PIN code, follow these steps:

• Turn on your Coldcard Mk4: Press and hold the power button until the device boots up.
• Enter the wrong PIN code three times: Intentionally enter an incorrect PIN code three times. After the third incorrect attempt, the Coldcard Mk4 will prompt you to enter your recovery seed.
• Enter your recovery seed: Use the navigation buttons to enter your 24-word recovery seed. This will reset your device to its factory settings.
• Set a new PIN code: Once your device is reset, you can follow the steps outlined earlier to set a new PIN code.

Additional Security Measures

In addition to setting a strong PIN code, there are other security measures you can take to protect your Coldcard Mk4 and your cryptocurrency assets. These include:

• Using a passphrase: The Coldcard Mk4 allows you to set an additional passphrase for added security. This passphrase is not stored on the device and must be entered each time you want to access your wallet.
• Storing your recovery seed securely: Your 24-word recovery seed is crucial for recovering your wallet if you lose access to your Coldcard Mk4. Store it in a secure location, such as a safe or a secure note-taking app.
• Regularly updating your firmware: Keep your Coldcard Mk4's firmware up to date to ensure that you have the latest security features and bug fixes.

Common Questions Related to Setting the Initial PIN Code on the Coldcard Mk4

Q: What should I do if I forget my PIN code on the Coldcard Mk4?

A: If you forget your PIN code, you can reset it by entering the wrong PIN code three times and then entering your 24-word recovery seed. This will reset your device to its factory settings, allowing you to set a new PIN code.

Q: How long can my PIN code be on the Coldcard Mk4?

A: The Coldcard Mk4 allows you to set a PIN code up to 12 digits long. It is recommended to use a longer PIN code for increased security.

Q: Can I use letters or special characters in my PIN code on the Coldcard Mk4?

A: No, the Coldcard Mk4 uses a numeric keypad, so you can only use numbers (0-9) in your PIN code.

Q: Is it possible to change my PIN code on the Coldcard Mk4 after setting it initially?

A: Yes, you can change your PIN code at any time by navigating to the 'Settings' menu, selecting 'PIN Code,' and choosing 'Change PIN.' Follow the prompts to enter your current PIN code and then your new PIN code.

Q: What happens if someone tries to guess my PIN code on the Coldcard Mk4?

A: After three incorrect attempts, the Coldcard Mk4 will prompt you to enter your recovery seed to reset the device. This prevents unauthorized access to your wallet.