Python wrapper around libsrtp

 pylibsrtp is a Python wrapper around libsrtp, making it
 possible to encrypt and decrypt Secure Real-time Transport
 Protocol (SRTP) packets from Python code.
 .
 SRTP is a profile of the Real-time Transport Protocol (RTP)
 which provides confidentiality, message authentication, and
 replay protection. It is defined by RFC 3711.