We connected two machines with KEIBIDROP and ran every program we could think of on the shared virtual folder. Compilers, version control, video processing, databases, scripting languages, security scanners. Everything worked. File integrity held across every operation.
KEIBIDROP presents the peer's files through the operating system's filesystem interface. Programs do not know the files are remote. They read and write to a folder. The data arrives from the other machine over an encrypted channel.
How the shared folder works between two machines
Machine A adds files to the shared folder. They appear on Machine B within a second. Machine B opens them, compiles them, processes them, and saves the output back to the shared folder. Machine A sees the output immediately. No upload, no download, no sync button. Both machines read and write to the same folder in real time, over an encrypted peer-to-peer connection.
We tested this with 45+ programs. Alice writes source code, Bob compiles it. Bob writes analysis results, Alice reads them. Alice has a video, Bob creates thumbnails from it. Every tool that reads files from a folder works. The programs do not know the files are on another machine.
Build tools
| Tool |
Test |
Result |
| git |
Clone repo, run git status and git log from the other side |
Works |
| make (C) |
Compile 87 source files inside the shared folder |
Works |
| cargo (Rust) |
cargo build --release on the shared folder |
Works |
| go build |
Init module, build binary on the shared folder |
Works |
| swiftc |
Compile Swift program on the shared folder |
Works |
| xelatex |
Compile LaTeX slides across mounts |
Works |
Media tools
| Tool |
Test |
Result |
| ffprobe |
Inspect 192 MB video from peer's folder |
Works |
| ffmpeg |
Extract clip, create thumbnail grid from peer's video |
Works |
| ImageMagick |
Read PNG, resize, identify 2048x5568 tileset |
Works |
Data and databases
| Tool |
Test |
Result |
| SQLite |
Create DB on one side, JOIN query from the other |
Works |
| SQLite (multi-table) |
RPG save with players + inventory, JOIN from peer |
Works |
| jq |
Write JSON on one side, parse from the other |
Works |
| Python csv |
Write CSV, read with DictReader from peer |
Works |
| Node.js |
Write file on one side, read from the other |
Works |
| Jupyter |
Write .ipynb on one side, parse from the other |
Works |
Languages
| Tool |
Test |
Result |
| Python |
Write module on Alice, import from Bob |
Works |
| Perl |
SHA256 hash with Digest::SHA across mounts |
Works |
| Ruby |
JSON + Digest::MD5 across mounts |
Works |
| Node.js |
npm install on one side, require from the other |
Works |
| Bash |
Write script on one side, execute from the other |
Works |
| Swift |
Compile and run across mounts |
Works |
File operations
| Tool |
Test |
Result |
| zip / unzip |
Zip repo on one side, unzip on the other |
Works |
| tar / gzip |
Create archive, extract on the other side |
Works |
| rsync --checksum |
Checksummed copy from shared folder |
Works |
| dd |
1 MB + 100 MB random data, SHA256 verified both sides |
Works |
| split + cat |
Split file on one side, reassemble on the other |
Works |
| base64 |
Encode on one side, decode on the other, hash match |
Works |
Integrity verification
| Tool |
Test |
Result |
| sha256 |
Same file hashed from both sides |
Identical |
| sha512 |
Same file hashed from both sides |
Identical |
| openssl dgst |
SHA256 digest from both sides |
Identical |
| md5 (bulk) |
All 71 .c files hashed, aggregate compared |
Identical |
| diff |
Source files compared across mounts |
Identical |
| crc32 |
CRC32 checksum from both sides |
Identical |
Security tools
| Tool |
Test |
Result |
| golangci-lint |
Lint Go source from peer's mount |
Works |
| gosec |
Security scan from peer's mount |
Works |
| openssl enc/dec |
AES-256-CBC encrypt on one side, decrypt from the other |
Works |
| exiftool |
Read image metadata from peer's file |
Works |
Collaborative workflows
The shared folder is bidirectional. Both sides can write. Two people can each handle a different step of the same project.
| Workflow |
Alice does |
Bob does |
Result |
| C compilation |
Writes main.c + headers |
Compiles from his view |
Alice runs the binary Bob built |
| LaTeX slides |
Writes .tex source |
Compiles PDF with xelatex |
Alice opens the PDF Bob produced |
| Data pipeline |
Writes 100-row CSV |
Runs Python analysis, writes JSON |
Alice reads Bob's results |
| Video processing |
Has a 190 MB video |
Creates thumbnail grid with ffmpeg |
Alice sees the thumbnails |
Large files
| Test |
Size |
Result |
| 100 MB random file, SHA256 from both sides |
100 MB |
Identical |
| 192 MB video, ffprobe from peer's mount |
192 MB |
Works |
| ffmpeg transcode: Bob processes Alice's video, output appears on Alice |
192 MB in, 153 KB out |
Works |
| 50 files written by Alice, aggregate hash verified by Bob |
50 files |
Identical |
| 71 source files tar'd, extracted on other side, all hashes verified |
71 files |
All match |
What does not work
| Operation |
Reason |
| Symlinks / hardlinks |
Not implemented. Tools like uv, npm with bin links fail. Use --no-bin-links or install outside the shared folder. |
| Execute binaries from mount (macOS) |
macOS blocks execution from FUSE mounts. Copy the binary locally first. Linux does not have this restriction. |
How it works
KEIBIDROP presents the peer's files through the OS filesystem interface (FUSE on macOS/Linux, WinFsp on Windows). Every program that reads files through standard system calls works without modification. The file metadata syncs when the connection establishes. File contents stream on demand as programs read them. The encryption overhead is under 2%.
The connection is end-to-end encrypted with post-quantum cryptography (ML-KEM-1024 + X25519). No server stores your files.
