KEIBIDROP and croc

A transfer tool, and a folder you can browse.

By Marius-Florin Cristian · 2 September 2026

croc sends what you name, from the command line, with a fresh code phrase each time. KEIBIDROP keeps saved peers so there is no code to pass along, it has a GUI as well as a CLI, and it can mount the other machine's folder so you pull one file out of it.

Side by side

KEIBIDROPcroc
InterfaceGUI and CLICLI and a browser page
Per-transfer codeNo, saved peersYes, a code phrase each time
Browse the other sideYes, it mountsNo
Open a file without receiving the folderYesNo
AccountNoneNone
EncryptionEnd to end, X25519 with ML-KEM-1024End to end, PAKE
Source codeOpen, MPL-2.0Open, MIT
Install footprintInstaller, plus a driver to mountOne binary

Saved peers instead of a code each time

The two sides exchange an 86 character fingerprint once and connect on it afterwards, so a folder you use every week costs nothing to reopen. croc generates a fresh code phrase per transfer and someone has to carry it across.

Browse the other side and pull one file

KEIBIDROP mounts the other machine's folder as a folder on yours, and a read pulls only the bytes it touches, so you open the one file you came for instead of receiving a whole directory. It is a real filesystem, so Premiere, Resolve, Blender, grep and git open a path on it the way they open a local one.

Post-quantum key exchange

KEIBIDROP is MPL-2.0, so anyone can confirm the key exchange is X25519 with ML-KEM-1024, and a recording taken today has to break both halves to be read once quantum hardware exists.

Limits

Common questions

Do I need to pass a code every time?

No. KeibiDrop peers exchange an 86 character fingerprint once and connect on it afterwards. croc generates a fresh code phrase for each transfer.

Is there a GUI?

Yes, and a CLI with a JSON line per command for scripting and agents. croc is a command line tool with a browser page.

Can I see what is on the other machine?

Yes. KeibiDrop mounts the folder, so you browse it and pull only the files you open.

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