Grumpy Old Geeks Topics PIN inference from Wi-Fi signals Topic PIN inference from Wi-Fi signals 2 mentions in 1 episode The hosts describe research suggesting that changes in Wi-Fi signals can reveal a phone PIN. Mentions 186: Back with a Vengeance Nov 18, 2016 45:50 inferring your mobile phone password via Wi-Fi signals 46:06 let them possibly sniff ... your PIN number