Adobe Acrobat XI Bedienungsanleitung PDF herunterladen (Seite 410)

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Electronic signatures

Last updated 1/14/2015

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Digital IDs

Setting up digital signatures

Signing PDFs

Validating signatures

Certificate-based signatures

A certificate-based signature, like a conventional handwritten signature, identifies the person signing a document.

Unlike a handwritten signature, a certificate-based signature is difficult to forge because it contains encrypted

information that is unique to the signer. It can be easily verified and informs recipients whether the document was

modified after the signer initially signed the document.

To sign a document with a certificate-based signature, you must obtain a digital ID or create a self-signed digital ID in

Acrobat or Adobe Reader. The digital ID contains a private key and a certificate with a public key and more. The private

key is used to create the certificate-based signature. The certificate is a credential that is automatically applied to the

signed document. The signature is verified when recipients open the document.

When you apply a certificate-based signature, Acrobat uses a hashing algorithm to generate a message digest, which it

encrypts using your private key. Acrobat embeds the encrypted message digest in the PDF, certificate details, signature

image, and a version of the document when it was signed.

Certifying and signing documents

The Sign > Work with Certificates panel lets you apply two types of certificate-based signatures. You can certify a

document attest to its content or approve a document with the Sign With Certificate option.

Certify Certify options provide a higher level of document control than Sign With Certificate. For documents that

require certification, you must certify the documents before others sign them. If a document has already been signed,

the Certify options are disabled. When you certify a document, you can control the types of changes other people can

make. You can certify with or without displaying a signature.

Sign With Certificate When you sign with a certificate, the signature is considered an approval signature.

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Kommentare zu diesen Handbüchern

avenue 06 Jan 2024 | 14:21:41

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novo pet 10 Jan 2024 | 15:26:21

Also what in that case to do?

Adobe Acrobat XI Bedienungsanleitung Seite 410

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