How can I sign digitally a document?

Aspose.Total Product Family
1
Andrés:
Hi,
I want to know a liittle bit more of how can I sign digitally a document using your procedures​. Is this sign legal in United States and European Union, Why ? Thanks in advance,
Andrés
Muhammad Ijaz:
Hi Andres,

Can you please share which types of documents you want to sign? At present, we support signing PDFs only as you can see at http://saaspose.com/docs/display/pdf/sign+%28Controller+Resource%29. Please also share which development platform you are using.

Obviously, a valid certificate can be obtained from a Certificate Authority to sign documents and it is legal in US or EU. Please have a look at http://en.wikipedia.org/wiki/Digital_signatures_and_law for more details.

Best Regards,
Muhammad Ijaz

Support Developer, Saaspose
Sialkot Team
http://www.saaspose.com
Andrés:
Thank you for your information,

Basically, We need:

1. A procedure to protect a document, if someone change the document,
then the document shouldn't be valid anymore. I Need a system online to
check if the document is valid.
2. A procedure to sign de document digitally (Could be DPF)
3. The procedure to send the document from one place to another place
(email) in a safe way.

Could you help me with that ? How much is it ?

All the procedures has to be done according European and United States
Legislation.

Thanks,
Andrés
Imran Rafique:
Hi Andres,

Thanks for the details. I would like to update you that you can password protect the documents using Saaspose REST API (e.g. doc/docx, xls/xlsx) but it will require password to change the document. The documents will become invalid if you will change a signed document. We can only sign PDF documents at the moment. I’m afraid. We don’t have an online system or editor to check the document is valid or not. For this purpose, I have asked the support team of GroupDocs - http://groupdocs.com/ (our sister company) to share details.

Second, we are planning to launch our new product Saaspose.Email. Once we have sufficient request for this product. After which you will be able to send the document from one place to another place in a safe way. Using GroupDocs, you can send a converted file to your email. I hope this will help you. It would be great if you can share your development platform. It will help us to share exact documentation links with you.

Please let us know in case of further assistance and comments.

Regards,
Imran Rafique
Support Developer, Saaspose
Support Team
http://www.saaspose.com
Andrés:
Thank you for your support. THE platform is Windows Azure using .NET
Thanks a lot
Imran Rafique:
Hi Andres,

Thanks for the information. Please find below the appropriate documentation links below:

API documentation:
http://saaspose.com/docs/display/words/protection
http://saaspose.com/docs/display/cells/protectWorkbook
http://saaspose.com/docs/display/pdf/sign+%28Controller+Resource%29

REST API example and sample projects:
http://saaspose.com/docs/display/words/Protect+a+Word+Document+%28.NET+REST%29
http://saaspose.com/docs/display/cells/Protect+a+Workbook+%28.NET+REST%29
http://saaspose.com/docs/display/cells/How+to+Protect+a+Workbook+%28.NET+REST%29
http://saaspose.com/docs/display/words/How+to+Protect+a+Word+Document+%28.NET+REST%29
http://saaspose.com/docs/display/pdf/Sign+PDF+documents+%28.NET+REST%29

Regards,
Imran Rafique
Support Developer, Saaspose
Support Team
http://www.saaspose.com
Imran Rafique:
Hi Andres,

It is to update you that I've logged your request to send the document using an email in a safe way (Saaspose.Email). I have logged this task under ticket id SAASEMAIL-107 in our issue tracking system. As soon as we have made some significant progress, we would be more than happy to update you.

Regards,
Imran Rafique

Support Developer, Saaspose
Support Team
http://www.saaspose.com
Imran Rafique:
Hi Andres,

Also, I want to let you know that as per our understanding, you require to build your own solution using .NET and Azure. Your requirements include the following:

1. Sign a PDF (supported)
2. Validate of Pdf documents (base feature is supported but need to integrate it with Saaspose Server - logged issue id: SAASPDF-83)
3. Send documents by Email (Some work has been done but Saaspose.Email API is not live yet - logged issue id: SAASEMAIL-107)

Regards,
Imran Rafique

Support Developer, Saaspose
Support Team
http://www.saaspose.com
This message was posted using Email2Forum by < Imran Rafique.
2

Hi Andres,


From the specifics of ticket id SAASPDF-83, Could you please let us know what validations you require to have? Because now Pdf/a validation is supported in the latest code base.