1master_secret,hex,"0102030405060708090a0b0c0d0e0f10" 2master_salt,hex,"9e7ca92223786340" 3id_context,hex,"37cbf3210017a2d3" 4sender_id,hex,"01" 5recipient_id,hex,"" 6replay_window,integer,30 7aead_alg,integer,10 8hkdf_alg,integer,-10 9ssn_freq,integer,4 10