Protect a document with a word digital signature

Do you know what is the use of Word digital signature ? Do you use Word digital signatures to protect your documents? Today I learn to worry about the content of Word digital signature.

One, what is "digital signature"

We all know the real life of the signature, signature on behalf of a person's exclusive "copyright" signature, oh, the so-called "digital signature" of course, through some kind of cipher operation to generate a series of symbols and code to form the electronic password for signature, he is a virtual electronic form of technical verification, Its verification accuracy is the general manual signature and the stamp verification and incomparable. Digital signature is one of the most widely used, technologically mature and most operable electronic signature methods in e-commerce and e-government. It uses the standardized procedure and the scientific method, is used to authenticate the signer's identity as well as to an electronic data content approval. It can also verify that the original document in the transmission process has no change, to ensure the integrity of the transmission of electronic files, authenticity and non-repudiation.

The digital signature is defined in the Iso7498-2 standard as: "Some data attached to a data unit, or a cipher transformation of a data unit, allows the receiver of the data unit to confirm the integrity of the data unit source and data unit, and to protect the data against forgery by a person (such as a receiver). The American Electronic Signature Standard (DSS,FIPS186-2) interprets digital signatures as follows: "Use a set of rules and a parameter to compute the results of the data, using this result to confirm the identity of the signer and the integrity of the data". The PKI (public key Infrastructino), as defined above, provides a password transform that provides data units, and enables the recipient to determine the source of the data and validate the data.

What's the use of Word digital signature?

The reason for digitally signing a document is similar to signing a paper document. Digital signatures are authenticated by using computer encryption (authentication: The process of verifying that the identity of the person and the product is declared to be true). For example, verify the source and integrity of the software publisher's code by verifying the digital signature used for the signature code. Digital information, such as documents, e-mail messages, and macros.

Word digital signatures help ensure the following:

The Authenticity--word digital signature helps to ensure that the signer's identity is consistent with the declaration.

Integrity--word Digital signatures help ensure that content is not changed or tampered with after it has been digitally signed.

The undeniable--word digital signature helps to prove the validity of the signed content to all parties. "Denial" means that the signer denies any act that is related to the content of the signature.

In order to ensure the above, content must be digitally signed by a content creator with a signature that satisfies the following criteria: The word digital signature is valid (valid: A certificate state that checks the certificate against the certificate Authority's database and finds that it is legal, up-to-date, and has not expired or been revoked.) Documents that are signed by a valid certificate and that have not changed after signing are treated as valid documents.

How to use Word digital signature to protect documents

Here's how to use Word digital signature to protect a document:

1. Select the Insert tab and click the Microsoft office Signature Line command in the signature line Drop-down list.

2, open the Signature Settings dialog box, enter the signer's name in the text of the proposed signer, enter the signer's title in the suggested signer's title text box, check the show signed date in signature line checkbox, and then click OK.

3. Double-click the inserted signature line in the document, open the Signature dialog box, and do the following:

I) to add a print version of the signature, enter a name in the text box to the right of "X".

II to select an image for your handwriting signature, click the Select Image button, in the Select Signature Image dialog box, look for the location of the signature image file, select the file you want, and then click the Select button.

4, after the completion of the above operation, click the "Signature" button, then pop-up "Signature Confirmation" dialog box, click the "OK" button.

The above is about the word digital sign related content, hope to be helpful to you.