%% You should probably cite rfc8643 instead of this I-D. @techreport{ietf-sipbrandy-osrtp-09, number = {draft-ietf-sipbrandy-osrtp-09}, type = {Internet-Draft}, institution = {Internet Engineering Task Force}, publisher = {Internet Engineering Task Force}, note = {Work in Progress}, url = {https://datatracker.ietf.org/doc/draft-ietf-sipbrandy-osrtp/09/}, author = {Alan Johnston and Dr. Bernard D. Aboba and Andrew Hutton and Roland Jesske and Thomas Stach}, title = {{An Opportunistic Approach for Secure Real-time Transport Protocol (OSRTP)}}, pagetotal = 9, year = 2019, month = may, day = 1, abstract = {Opportunistic Secure Real-time Transport Protocol (OSRTP) is an implementation of the Opportunistic Security mechanism, as defined in RFC 7435, applied to Real-time Transport Protocol (RTP). OSRTP allows encrypted media to be used in environments where support for encryption is not known in advance, and not required. OSRTP does not require SDP extensions or features and is fully backwards compatible with existing implementations using encrypted and authenticated media and implementations that do not encrypt or authenticate media packets. OSRTP is not specific to any key management technique for SRTP. OSRTP is a transitional approach useful for migrating existing deployments of real-time communications to a fully encrypted and authenticated state.}, }