Signatures and verification

ASiC-E Digital Signature Viewer: see who signed and when

Often you do not need to validate anything. You need an ASiC-E digital signature viewer to answer a simpler question: who has signed this, and is anyone still missing?

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The question people actually ask

A contract goes round three board members. A week later someone asks whether everyone has signed. Opening the container in a signature viewer answers in five seconds: count the cards.

What each card shows

  • Name and identifier of the signer.
  • Signing time, so the order of signing is visible.
  • Role or resolution, if the signer typed one, such as "Board member" or "Approved with remarks".
  • Place, if given.
  • Integrity of the signed files for that signer.

In ASiCE Viewer the cards are listed in the order the signatures are stored, which is normally the order of signing.

Following a signing round

StageWhat the viewer shows
Container created, nobody signedNo signature cards
First party signedOne card
Sent on and signed by the second partyTwo cards, the second with a later time
Someone replaced a document mid-wayIntegrity error on the earlier signatures

The last row is worth remembering. If a document is changed after the first person signed, the first signature no longer matches. The fix is a fresh container signed by everyone.

Resolutions and conditional approvals

Estonian practice allows a signer to add a short text when signing. It is part of the signed data and cannot be edited afterwards. A viewer displays it next to the name, so a conditional approval is not overlooked.

Signatures and time stamps together

Besides personal signatures a container may carry an organisation's e-seal or, in ASiC-S containers, a bare time stamp without any signer. A seal shows an organisation's name where a person's would be, and a bare time stamp appears as a note above the file list, so you can tell a personal approval from an automated one.

When viewing is enough

  • Checking progress of a signing round.
  • Confirming which version of a document someone signed.
  • Finding out who to remind.
  • Reading a resolution text.

When the question becomes "would this stand up legally?", move on to validation as described in verify an ASiC-E signature.

On the phone

A reminder to sign usually reaches people on their phones. The ASiC-E Viewer app shows the same signer list offline, straight from a mail or chat attachment.

Frequently asked questions

Can I see in which order people signed?

Yes. Each signature has its own time, and the cards are listed in stored order.

Does the viewer notify me when someone signs?

No. A container is a file; open the latest version you received to see its current signatures.