OpenOffice.org OpenOffice - 3.2 Guía de inicio rápido descargar pdf (Pagina 340)

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When someone later opens the document on any computer with a

recent version of OpenOffice.org, the program will compute the

checksum again and compare it with the stored checksum. If both are

the same, the program will signal that you see the original, unchanged

document. In addition, the program can show you the public key

information from the certificate. You can compare the public key with

the public key that is published on the web site of the certificate

authority.

Whenever someone changes something in the document, this change

breaks the digital signature.

On Windows operating systems, the Windows features of validating a

signature are used. On Solaris and Linux systems, files that are

supplied by Thunderbird, Mozilla or Firefox are used. For a more

detailed description of how to get and manage a certificate, and

signature validation, see “Using Digital Signatures” in the OOo Help.

To sign a document:

1) Choose File > Digital Signatures.

2) If you have not saved the document since the last change, a

message box appears. Click Yes to save the file.

3) After saving, you see the Digital Signatures dialog. Click Add to

add a public key to the document.

4) In the Select Certificate dialog, select your certificate and click

OK.

5) You see again the Digital Signatures dialog, where you can add

more certificates if you want. Click OK to add the public key to

the saved file.

A signed document shows an icon in the status bar. You can double-

click the icon to view the certificate.

340 Getting Started with OpenOffice.org 3.x

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