Using subliminal channels to hide data in TLS handshakes

Uses EdDSA signatures to smuggle arbitrary bytes through TLS handshakes — a classic subliminal-channel trick applied to modern TLS code. The repo includes an actual client/server PoC (https_client.c, https_server.c), a cert generation script, and a bundled wolfSSL build so you can reproduce the experiment. Clever demo, but it reads like research code rather than a hardened tool: there's little on threat modelling, detection, or performance trade-offs.