Croc: Easily and securely send things from one computer to another
A more popular and, I think, carefully analyzed alternative, from which croc was inspired, is Magic Wormhole; a good Golang implementation that compiles down to a single binary is wormhole-william:https://github.com/psanford/wormhole-william/releasesI believe croc has some features wormhole doesn't (and some anti-features, like being able to pick curves and hashes). But also just that it's worth knowing that Magic Wormhole is kind of the "default" tool that does this.