WhatsApp messages sent via Wi-Fi (Open, WEP, WPA/WPA2) may be intercepted by WhatsAppSniffer. “The application is designed to demonstrate that the security of WhatsApp’s communications is null”, the Spansih developer explains.

WhatsAppSniffer captures conversations, pictures, videos and coordinates which are sent or received by an iPhone, Nokia or Android phone on the same Wi-Fi network. Messages via BlackBerry can’t be read by the application, as they use their own servers and not the ones from WhatsApp. The application has not been tested with Windows Phones.

WhatsAppSniffer uses Tcpdump which reads all Wi-Fi networks and filters those with origin or destination WhatsApp’s servers.

WhatsApp does not comment on rumors or speculation. “We focus a lot on our users’ security and are investigating the matter”, WhatsApp commented to WhatsAppen.nl.