A method includes receiving, at a first wireless device, from a second wireless device, content and an identification of the second wireless device, over a peer-to-peer wireless communication link. The received content is rendered and verification information containing the identification of the second wireless device and an identification of the received content is generated at the first wireless device. The verification information is then encrypted at the first wireless device using an encryption key. Apparatus and a computer program product counterparts to the method are also disclosed.