NIST FIPS 204
ESIGN Act
ML-DSA-65
Post-Quantum Secure
eIDAS Compatible
Sign a document
Legally binding. Quantum-resistant. Verifiable forever.
01 — Document
02 — Signing Identity
A new ML-DSA-65 keypair will be generated when you sign. Download and save it afterwards to reuse.
Paste the keypair JSON you downloaded from a previous signing session.
Document
KXCO ID
Signed at
Purpose
Algorithm
ML-DSA-65 (NIST FIPS 204)
Verification QR Code
![Verification QR code]()
Scan to verify this signature. The URL is only accessible via this QR code — it is not indexed or linked from anywhere.
Download
Keep your signing identity safe. You will need it to prove you signed future documents.
Share only the publicKey field — never the secretKey.
Save your signing identity
A new keypair was generated for this signature. Download it above.
If you lose it you cannot prove you signed this document.
Document Signature Certificate
Document:
KXCO ID:
Signed at:
Algorithm: ML-DSA-65 (NIST FIPS 204)
Scan to verify:
![QR]()
Multi-party signing
Upload a document, add up to 5 signers. Each receives a unique signing link.
03 — Signers (up to 5)
Signing Request Created
Created
Document
Signer Links
Share each link with the corresponding signer. Links expire after 30 days.