Juice jacking is a cyberattack where a public USB charging port is used to install malware on a device or steal data such as passwords, credit card information, addresses, and names. It’s a type of compromise that targets devices like smartphones and tablets, which use the same cable for charging and data transfer.
While the concept of juice jacking has been demonstrated as technically possible, there have been no credible reported cases of it occurring outside of research efforts as of April 2023. However, it’s still important to be cautious. Here are some tips to guard against juice jacking:
- Use AC power outlets instead of USB ports when available.
- Carry your own USB cables and chargers when traveling.
- Use a charging-only cable that prevents data from being sent or received while charging.
- If prompted to select “share data” or “trust this computer” when plugging into a USB port, always select “charge only.”
To protect your phone from juice jacking, consider the following precautions:
Use Your Own Charger and Cable: Whenever possible, use your own charger and USB cable. Avoid using public charging stations or cables provided by others.
Charge from AC Power Outlets: Instead of relying on USB ports, use AC power outlets to charge your phone. These outlets are less likely to be compromised.
Carry a Charging-Only Cable: Invest in a charging-only USB cable. These cables prevent data transfer while allowing your device to charge. Look for cables that have only the power pins connected (no data pins).
Disable Data Transfer Mode: When connecting your phone to a computer or other device via USB, always select “charge only” or “do not transfer data.” Avoid choosing options like “share data” or “trust this computer.”
Be Cautious with Public Charging Stations: If you must use a public charging station, be vigilant. Consider using a portable power bank instead. If you do use a public station, inspect it for any signs of tampering or suspicious devices.
Consider a USB Data Blocker: USB data blockers are small adapters that allow only power to flow through the cable while blocking data transfer. They are inexpensive and can add an extra layer of protection.
To ensure the safety of a charging port, especially when using public charging stations, follow these precautions:
Inspect the Charging Port: Look for any signs of tampering or damage on the charging port. If it appears broken, loose, or altered, avoid using it. Check if the port is clean and free from debris. Dust, lint, or foreign objects can affect the connection.
Use Your Own Charger and Cable: Whenever possible, use your own charger and USB cable. Avoid using public charging stations or cables provided by others. Carry a charging-only USB cable that prevents data transfer while allowing your device to charge.
Choose AC Power Outlets Over USB Ports: Use AC power outlets instead of USB ports when available. AC outlets are less likely to be compromised. If you must use a USB port, be cautious and inspect it for any irregularities.
Disable Data Transfer Mode: When connecting your phone to a computer or other device via USB, always select “charge only” or “do not transfer data”. Avoid choosing options like “share data” or “trust this computer.”
Be Vigilant at Public Charging Stations: If using a public charging station, pay attention to any unusual behavior or unexpected prompts on your device. Consider using a portable power bank instead of public stations.
Consider USB Data Blockers: USB data blockers (also known as USB condoms) allow only power to flow through the cable while blocking data transfer. These inexpensive adapters add an extra layer of protection.