The way to deal with authenticity
is to hold proof.

We are not an encryption company. We produce proof at scale, for every action, on every file, without needing to see the content.

Everything below is public. You can verify it yourself, on your data, your files, from your terminal, without contacting us, without an NDA, without signup.

Sign a file. Modify it. Try to verify.

5 commands. Open, live on npm. The final command is the flag, it succeeds only if the file is unchanged. Modify a single bit and verification fails.

Samples you verify, not us.

Four artifacts. Download, inspect, verify. Then change one bit and try again, watch the forgery attempt fail.

Four documents. Every algorithm, every choice, every trust boundary.

What a security engineer needs before trusting any vendor. What stays closed has its own document explaining why, item by item.

Copy → paste → run → verify.

No SDK to install. Just stdlib + an HTTP call to the public endpoint. Three languages, identical logic.

// 15 lines, Node.js verify a NoData receipt
import { readFileSync } from 'fs';
import fetch from 'node-fetch';
const receipt = JSON.parse(readFileSync('sample-receipt.json','utf8'));
const file_bytes = readFileSync('secret-roadmap.pdf');
const sha256 = require('crypto').createHash('sha256')
  .update(file_bytes).digest('hex');
const r = await fetch('https://nodatacapsule.com/api/verify', {
  method: 'POST',
  headers: { 'content-type': 'application/json' },
  body: JSON.stringify({ content_hash: 'sha256:'+sha256, sidecar: receipt })
});
const v = await r.json();
console.log(v.valid ? '✓ authentic, signed by ' + v.signer
                    : '✗ tampered or unknown');

Encrypt latency (p50 / p95 / p99)

Measured on AWS m6i.large (Intel Xeon, AES-NI), Node.js 20, payload type: with full AAD, receipt signed concurrently. 10,000 runs per size.

Nine tools. Download, integrate, no return trip required.

All run without an account on our side and without an NDA. These are what you drop into your CI, your Terraform, your Postman workspace, your bench script, today, before you've even decided whether we're a fit.