Send a file securely via croc relay

Securely transfer a file to any remote machine bypassing NAT using a custom code phrase and the croc relay network.

$ croc send --code "super-secret-phrase" ./payload.tar.gz

1. [01] croccroc
   Invokes the croc file transfer utility, which uses relay servers to easily bypass NAT and firewalls.
2. [02] crocsend
   Instructs croc to act as the sender in the peer-to-peer transfer.
3. [03] croc--code "super-secret-phrase"
   Defines a custom, pre-shared secret phrase instead of relying on an auto-generated one.
4. [04] croc./payload.tar.gz
   The target file to be encrypted (using PAKE) and sent across the relay.

Sending 'payload.tar.gz' (14.2 MB)
Code is: super-secret-phrase
On the other computer run

croc super-secret-phrase

• Footgun: If the custom code phrase is too simple or easily guessable, a third party could intercept the transfer before the intended recipient connects.
• Permission/Cost: Uses the public croc relay by default; for highly sensitive enterprise data, consider hosting your own private relay server.