I am using RTI_ConnextDDS_5.2.0 but I look at examples\connext_dds\c\hello_world_tcp\README.txt
In order to break the dependency between the TCP transport library and the
OpenSSL library, when TLS security is enabled, the transport will
dynamically
load the following library:
Unix: libnddstls.so (release version)
libnddstlsd.so (debug version)
Windows:nddstls.dll (release version)
ndstlsd.dll (debug version)
The NDDSTLS Library will then dynamically load the OpenSSL during its
initialization.