Sindook

A local Apache-2.0 CLI. X-Wing pairs X25519 with ML-KEM-768. The name is Bengali for strongbox.

Sindook seals files with hybrid post-quantum encryption.

v0.11.1Latest

Apache-2.0License

Local CLINo host

Install v0.11.1 View source

Install

Install v0.11.1

The Homebrew tap is ruddro-roy/sindook. The curl and PowerShell scripts work without Homebrew.

Homebrew

brew install ruddro-roy/sindook/sindook

Linux or macOS

curl -fsSL https://raw.githubusercontent.com/ruddro-roy/sindook/main/scripts/install.sh | sh

Windows PowerShell

irm https://raw.githubusercontent.com/ruddro-roy/sindook/main/scripts/install.ps1 | iex

Go 1.26.6 or newer

go install github.com/ruddro-roy/sindook/cmd/[email protected]

After install, this is enough.

sindook init
sindook seal report.pdf
sindook open report.pdf.sindook

Commands

init: Creates your identity.
seal: Encrypts a file.
open: Decrypts a sealed file.
verify: Checks a sealed file without writing plaintext.
scan: Audits TLS endpoints and local key files for weak or quantum-vulnerable crypto.
inspect: Reads metadata without credentials.
rewrap: Rotates recipients without rewriting the payload.
rotate: Retires one identity across every file it can open.
contacts: Stores named public keys.
doctor: Checks the install.
selftest: Runs the built-in checks.

Limits

This is pre-1.0. Nobody has independently audited it. X-Wing is still an IETF draft. I am the only maintainer.

The CLI stays free. I am not selling a hosted version.

About

I came from electrical and electronics engineering into software. Sindook is the only product I am building now.

Work

Things that exist.

Sindook is the product. The rest stay online because I still get asked.

Sindook

A local Apache-2.0 CLI. X-Wing pairs X25519 with ML-KEM-768. Desktop is not shipping.

Source

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Repo

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Source

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An old biosensor simulation. I keep the companion page up.

Companion page

Notes

Things I am turning over.

Short. Dated. Not posts.

31 Aug 2026

Nobody has audited this.

Sindook is pre-1.0. X-Wing is still an IETF draft. I am the only maintainer.

A crypto tool that hides those facts is selling confidence it has not earned.

Writing

Latest entry.

A place to write.

31 Aug 20261 min readJournal

I've been mulling over the idea of having a dedicated space for myself. Where I can just write whenever I feel like it.

Read entry

Opportunities

Open to the right role.

I'm open to any opportunity involving work in this city – on-site, local, remote, or involving any combination of the three – to include a full relocation for the right role, or a more permanent remote arrangement. I'm well-versed in a variety of different organizational structures and respective time zones, and am more interested in finding the best cultural fit than adhering to arbitrary geographic boundaries.

If the fit sounds right, email me.