Developer on appear.in here: Everything between peers is encrypted using SRTP end-to-end by default. From our FAQ:
"All communication between your browser and appear.in is transmitted over an encrypted connection (SSL). Video and audio transmitted in the service is sent directly between the participants in a room and is encrypted (SRTP) with client generated encryption keys. In some cases, due to NAT/firewall restrictions, the encrypted data content will be relayed through our server."
"All communication between your browser and appear.in is transmitted over an encrypted connection (SSL). Video and audio transmitted in the service is sent directly between the participants in a room and is encrypted (SRTP) with client generated encryption keys. In some cases, due to NAT/firewall restrictions, the encrypted data content will be relayed through our server."