SAKK Platform
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Cryptographic Document Certification

High-assurance document integrity platform. Issues ECDSA-signed certificates with zero-disk retention architecture. Audited via immutable SQLite ledger.

ECDSA secp256r1Algorithm
SHA-256Digest Function
StatelessStorage Policy
ActiveAudit Logging
Authentication Required

Issue Certificate

Generate an ECDSA signature and embed a cryptographic QR seal.

Select file for certification
Seal Metadata
Zero-Retention: Metadata is embedded only in the cryptographic signature and QR seal. Nothing is stored on the server.
Transparent background is applied automatically.
PDF Renderer Active X: 0% | Y: 0% | Scale: 20%
Generating Digest & Signature...
Certification executed successfully.
SHA-256 Digest
ECDSA Signature (Base64)

Verify File Integrity

Upload a document to automatically scan its QR seal and verify its cryptographic integrity.

Select original file
Scanning for QR seal & computing verification matrix...
Document SHA-256 Digest

Scan QR Seal

Decode and verify embedded QR payloads from images or PDFs.

Select PNG, JPG, or PDF
Awaiting video stream...
Decoding and verifying payload...
Source Filename
Logged Timestamp
Embedded SHA-256 Digest

Audit Log Ledger

ID Target File SHA-256 Digest (Truncated) Signature State UTC Timestamp
Authentication required to view audit ledger.