libsrtp2-docs 2.4.2-3 (s390x binary) in ubuntu kinetic

 SRTP is a security profile for RTP that adds confidentiality, message
 authentication, and replay protection to that protocol. It is specified
 in RFC 3711.
 .
 LibSRTP provides an implementation
 of the Secure Real-time Transport Protocol (SRTP),
 the Universal Security Transform (UST),
 and a supporting cryptographic kernel.
 .
 This package contains API documentation.