Electromagnetic attack
Smartphones
#### Smartphones

[Smartphones](/wiki/Smartphone "Smartphone") are of particular interest for electromagnetic side\-channel attacks. Since the advent of [mobile phone payment systems](/wiki/Mobile_payment "Mobile payment") such as [Apple Pay](/wiki/Apple_Pay "Apple Pay"), e\-commerce systems have become increasingly commonplace. Likewise, the amount of research dedicated to mobile phone security side channel attacks has also increased. Currently most attacks are proofs of concept that use expensive lab\-grade signal processing equipment. One of these attacks demonstrated that a commercial radio receiver could detect mobile phone leakage up to three meters away.

However, attacks using low\-end consumer grade equipment have also shown successful. By using an external USB sound card and an induction coil salvaged from a wireless charging pad, researchers were able to extract a user's signing key in Android's OpenSSL and Apple's CommonCrypto implementations of ECDSA.


Can I use a smartphone in a secure environment if I'm using a secure payment method?