File certification
Upload one or several files to the JAAK Platform and obtain a NOM-151 certificate (timestamp seal from a Certification Services Provider) for each one, with its SHA-256 fingerprint, event history, download and verification.
Introduction
The File certification section of the JAAK Platform lets you upload one or several files and certify them with a NOM-151 certificate: the timestamp seal issued by a Certification Services Provider (PSC) which proves the existence and integrity of the file at a given moment.
For each file the following is recorded:
- The original file, which you can download at any time.
- Its SHA-256 fingerprint, which uniquely identifies the file's content.
- The NOM-151 certificate issued by the PSC, with its certificate number.
- Who uploaded it and when, plus the file's event history.
Who can use it: certifying files requires a user with the Owner, Administrator or Manager role. The other actions (consult, download, verify and view the history) are available to any company user who is signed in.
Requirements:
- Your company needs the timestamp provider (PSC) configured, the same requirement as NOM-151 certification in signature flows.
- Certification consumes quota: each certified file uses 1 unit of the file certification consumable. Quota is assigned by JAAK; ask your JAAK contact if your company has no units available.
Open the section
- Sign in to the JAAK Platform.
- In the menu, open Signature.
- Select File certification.
The list of your company's files is shown, with search by name and the status of each one: Certified or Failed (with its reason).
Certify files
- Click Certify files.
- Choose one or several files (up to 20 files per request).
- Click Certify.
Limits per request: 1 to 20 files, 10 MB per file and 90 MB in total. The platform warns you before sending if you exceed any of them.
When it finishes, each file shows its result:
| Result | What it means |
|---|---|
| Certified | The PSC issued the NOM-151 certificate and the file was recorded with its SHA-256 fingerprint. |
| Failed | That file's certification could not be completed; you see the reason in the detail. The other files in the same request certify normally. |
If a file fails, the quota unit it occupied is not consumed: you can retry it later.
Detail and download
Open any file in the list to see its detail: name, size, SHA-256 fingerprint, certificate number and certification date, together with its event history.
From the detail you can download the file. The file you download is identical to the original: it has the same SHA-256 fingerprint recorded when it was certified.
Verify files
Verify compares the SHA-256 fingerprint of the file you upload today with the fingerprint recorded when it was certified. It proves that a file has not changed since its certification.
Important: verifying certifies nothing and does not consume quota. To certify a new file, use Certify files.
Manual verification (one file)
- Open the detail of the certified file.
- Click Verify.
- Upload the file exactly as you have it today and confirm.
The result shows whether the file is identical to the certified one or whether its content changed.
Bulk verification (several files)
- In the list, click Verify files.
- Upload one or several files (up to 20 per request).
- Each file is compared with your company's certified files.
| Result | Reason |
|---|---|
| Valid | The file's fingerprint matches a certified file. |
| Not valid (content modified) | The fingerprint does not match: the file changed compared to the certified copy. |
| Not found | Your company has no certified file with that fingerprint. |
Event history
Each file records its event history, with date, time and user:
- File uploaded: the file was uploaded to the platform.
- NOM-151 certificate issued: the PSC issued the certificate.
- File downloaded: someone downloaded the file.
- File verified: someone verified the file.
FAQ
What is NOM-151? It is the Mexican standard that supports the certificate of issue of a documentary copy. The PSC seal proves that the file's content existed, unaltered, at the stated date and time.
How much quota does it use? Each certified file consumes 1 unit of the file certification consumable. Verifying and downloading do not consume quota. If the company has no units available, the platform tells you to contact JAAK.
Can I certify any type of file? Yes. The limits are of size and quantity: 10 MB per file, 90 MB per request and 20 files per request.
Does verification replace certification? No. Verifying only compares fingerprints: it confirms whether a file matches an already certified one. If the file is not certified, use Certify files.
Where do I download the certificate? Each certification has its certificate number in the file's detail; through the API you can obtain the full certificate (see File certification API).