OTP signature

The e-signature with OTP is a technology used to sign PDF documents using a verification system for the signatory based on an SMS message carrying a random code (One Time Password or OTP).

OTP signature

OTP signature

The e-signature with OTP is a technology used to sign PDF documents using a verification system for the signatory based on an SMS message carrying a random code (One Time Password or OTP).

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OTP SIGNATURE

The technology behind the OTP signature

It allows for the creation of simple or advanced e-signature processes and is particularly suitable whenever the signatory is not physically present at the organization requiring the signature.

Moreover, for this technology, there is no need for a dedicated hardware.

To sign, the signatory can use the standard electronic tools s/he already has at hand: e-mail address, web browser, cell phone with a working SMS service.

You will be contacted by our staff for more information

OTP SIGNATURE

The technology behind the OTP signature

It allows for the creation of simple or advanced e-signature processes and is particularly suitable whenever the signatory is not physically present at the organization requiring the signature.

Moreover, for this technology, there is no need for a dedicated hardware.

To sign, the signatory can use the standard electronic tools s/he already has at hand: e-mail address, web browser, cell phone with a working SMS service.

You will be contacted by our staff for more information

HOW DOES THE OTP SIGNATURE WORK?

The OTP signature

Technically speaking, signing a PDF document electronically with an OTP technology via SMS follows the process briefly described here:
  • An e-mail is sent to the signatory with a link to access the document
  • Through any Internet browser, the user opens the link
  • Before authorizing the access to the document, an OTP code is sent via SMS to the signatory’s cell phone
  • The signatory authenticates him/herself using the OTP code received, then s/he can access the document using the browser on their computer, tablet, or smartphone.
  • The signatory signs the document via web browser
  • A digital stamp containing basic information such as signatory’s name, date and time of signature, is automatically generated and included in the document.
  • The document is sealed via PAdES mode using a technical signature certificate. This signature (PAdES) ensures that the document cannot be edited after the graphometric signature has been applied. This signature does not have any value in the document signing, but is useful only to guarantee that the signature process is safe.
  • A log document for the whole process is generated by the system, to be checked in case of dispute.
  • Alternatively, it is possible to request the option that the OTP code is sent for each and every signature required for the document.

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THE OTP SIGNATURE

In the event of a dispute

In case there is the need to verify that the signature is authentic, the log file generated automatically by the system can be used. The file is duly preserved by the provider of the e-signature service, together with the document signed.

The log file contains a detailed trace of everything that happened from the moment when the document was uploaded in the e-signature system to when it was closed. 

All the events are marked with a timestamp and, if available, also the information of place.  

The events detailed in the log file include:

  • An identification of the document to be signed
  • An e-mail address to which the notification was sent
  • Cell phone number and OTP code sent via SMS
  • An indication of the pages visualized by the signatory
  • Information on date, time, place (if available) of the signature(s)

You will be contacted by our staff for more information

THE OTP SIGNATURE

In the event of a dispute

In case there is the need to verify that the signature is authentic, the log file generated automatically by the system can be used. The file is duly preserved by the provider of the e-signature service, together with the document signed.

The log file contains a detailed trace of everything that happened from the moment when the document was uploaded in the e-signature system to when it was closed. 

All the events are marked with a timestamp and, if available, also the information of place.  

The events detailed in the log file include:

  • An identification of the document to be signed
  • An e-mail address to which the notification was sent
  • Cell phone number and OTP code sent via SMS
  • An indication of the pages visualized by the signatory
  • Information on date, time, place (if available) of the signature(s)

You will be contacted by our staff for more information

ADVANCED E-SIGNATURE

OTP signature in an AES process

The OTP signature via SMS is a technology that can be used to create an Advanced e-signature process because it meets some of the requirements listed in the Decree of the President of the Council of Ministers of 22/02/2013 which, together with the requirements guaranteed by the process, complete the framework defined by the regulations detailing the Advanced e-signature.

More specifically, the OTP signature via SMS guarantees:

Univocal connection
Univocal connection
Exclusive control
Exclusive control
Verification
Verification
Signing
No editing
No editing
Provider identification
Provider identification
Unique link signature-document
The OTP signature technology via SMS, together with the definition of a process that can meet all the requirements listed in the regulations, can be used to create an Advanced Electronic Signature.

Start signing your documents with an OTP signature

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