Glossary

Term	Means
Code phrase / secret	The NNNN-word-word-word string both sides use to find each other and derive the session key. Custom codes are at least 6 characters.
PAKE	Password-Authenticated Key Exchange. Turns the weak code phrase into a strong encryption key without the relay ever learning it.
Relay	The server both sides connect to when a direct local-network path isn't available. Sees ciphertext only, never the key.
Room	The rendezvous channel on the relay, derived from the first 4 characters of the code phrase. Two codes sharing those characters can collide into the same room.
Curve	The elliptic curve PAKE runs over. CrocApp uses croc's default.
Hash algorithm	The integrity check used on transferred files.
LAN peer discovery	The mechanism that lets same-network transfers skip the relay entirely; not guaranteed to work on every network.
Local-only	A setting that forces a transfer to stay on the local network, refusing the relay if a direct path isn't available.
Compression	File data is compressed by default in transit; it can be turned off.
Trust badge	The on-screen indicator showing that a transfer is end-to-end encrypted and which relay path it's using.
Transfer history	CrocApp's local, on-device-only log of past transfers.

For the full contributor and internals glossary (croc protocol internals, the Go/gomobile bridge, app architecture, and repo conventions), see docs/GLOSSARY.md on GitHub.