I’ve made simple TCP protocol enchangement, not the end points can securelly communicate with out any hassle of cert files. The STCP main goal was to be protocol that automatically forms a secured communication channel with out need of any files. It uses the Elliptic key exchanage protocol paired with secure AES-encryption. There are none alike!
Sources are available at https://github.com/MiesSuomesta/STCP and they have implementation as Dart and as Python as well.
BE secure, use STCP, there are no excuses not to use.