A growing number of travellers are wrapping their passports in aluminium foil before boarding flights, hoping the simple household item can protect the sensitive information stored inside modern biometric passports.
The unusual travel hack has gained popularity on social media and among frequent flyers, with supporters claiming it helps prevent unauthorised scanning of passport data while travelling.
Why do modern passports have chips?
Most passports issued in recent years, including those from Greece, Australia, the United States and many European countries, contain an embedded RFID (Radio Frequency Identification) chip.
The chip stores encrypted information such as the passport holder’s identity details, digital photograph and other biometric data. It allows border officials to verify a traveller’s identity quickly using specialised readers at airports and immigration checkpoints.
Why aluminium foil?
The theory behind the hack is straightforward.
Aluminium foil can block or weaken radio signals, effectively acting as a basic Faraday cage. When wrapped completely around a passport, it may prevent RFID readers from communicating with the embedded chip.
Supporters say this provides an extra layer of privacy by reducing the possibility of someone attempting to read the chip without the owner’s knowledge while the passport is stored in a bag or pocket.
Potential benefits include:
- Blocking unauthorised RFID scanning.
- Adding an extra layer of protection for biometric data.
- Reducing passive exposure while travelling.
Is passport RFID theft a real risk?
Cybersecurity experts acknowledge that RFID skimming is technically possible under certain circumstances. However, real-world cases involving cloned biometric passports are extremely rare.
Modern e-passports use multiple layers of encryption and security features designed to prevent unauthorised access. In many cases, the chip cannot be fully accessed without first reading information printed inside the passport itself, making successful attacks significantly more difficult.
For most travellers, the risk remains very low.
How to tell if your passport has an RFID chip
You can usually identify a biometric passport by looking for the international e-passport symbol on the front cover—a small rectangular icon with a circle in the centre near the bottom of the cover.
If your passport displays this symbol, it contains an electronic chip.
Should you wrap your passport?
There is no requirement from immigration authorities or border agencies to wrap a passport in aluminium foil.
While doing so may offer a simple additional layer of protection against theoretical RFID scanning, experts generally recommend focusing on more practical security measures, such as keeping your passport secure, avoiding loss or theft, and using an RFID-blocking passport holder if you want added peace of mind.
For travellers who prefer a low-cost precaution, a sheet of aluminium foil may provide reassurance—but it should be viewed as an optional privacy measure rather than an essential travel necessity.