Le fait de passer à travers le nat via un relay public ou que l'on peut héberger (plus secure) me plait bien, même s'il faut natter un port vers le relay, ça reste assez simple en soi.
croc = fast + secure + easy
I’ve been working on an open-source tool that takes these ideas to heart: croc. Because its open-source and implemented in a language that easily cross compiles (Go) it can be implemented anywhere and thus will (hopefully) always be a fast, secure, and really easy way to send data.
AFAIK, croc is the only CLI file-transfer tool does all of the following:
allows any two computers to transfer data (using a relay)
provides end-to-end encryption (using PAKE)
enables easy cross-platform transfers (Windows, Linux, Mac)
allows multiple file transfers
allows resuming transfers that are interrupted
does not require a server or port forwarding
Source: https://schollz.com/blog/croc6/