How to sign documents in MS Office?
Using Microsoft Office Suite and ACS' CSP Middleware, users can sign Documents, Powerpoint presentaion and Excel files using certificates that are stored on the ACOS5 Card/CryptoMate devices.
Digital certificates and signatures help to assure you that the file that you are about to use comes from a reliable source. They help to assure you that the file has not been tampered with.
Before signing, users must ensure that he/she had requested a digital certificate from a trusted CA.
Follow the steps below to Sign a document in MS Word.
- In MS Word, click Tools -> Option -> Security -> Digital Signatures?
- Select the certificate for your signature and encryption (Figure 1).
Figure 1: Selecting Certificate for Document signing
- Click "OK" on the "Select Certificate" dialog.
- Enter ACOS5 PIN to get access to the Digital Certificate inside the ACOS5 (Figure 2).
Figure 2: Enter ACOS5 PIN
- After submitting the PIN, wait until the signing process is finished. The Signing process might depend on the file size of the document that is being signed.
- After successfully signing the document, the user should see a "Red Ribbon" at the status bar of the document. This indicates that the document has been signed (Figure 3).
Figure 3: A signed document.
- No modification is allowed, or the signature will be invalid (Figure 4)
Figure 4: A signed document that is being modified
- The same can be done on powerpoint, Excel and other applications in MS office.