You can sign PDF with digital signature or handwritten signature using PDFelement.
A digital signature acts as a traditional handwritten signature that can be used to authenticate the identity of a user as well as the document content. It stores information about the signer along with the date, time, and state of the document when it was signed.
Digital ID is the identity of a person/organization, which contains your name, email address, serial number, expiration date, and the name of the company. A digital ID contains two keys, one is a public key (certificate) that is used to encrypt or lock data, and the other is a private key that is used to decrypt or unlock data that is encrypted.
You can distribute the certificate that contains the public key and other identifying information to those who need it to verify your identity, validate your signature, or encrypt a document for you. Only your private key can unlock information that was encrypted using your certificate. For security purposes, make sure to store your digital ID in a safe place.
You can not only obtain a digital ID from a trusted third-party provider called a Certificate Authority (CA). However, you can also create a self-signed digital ID with PDFelement. Digital IDs are usually protected by a password, which you can store on a computer in PKCS#12 file format, or in the Windows Certificate Store.
Open a PDF that already has the Signature field and click the "Protect" > "Sign Document" button, then choose your ID to sign.
If you do not have an ID yet, click on the "New ID" button, select the "I want to create a new digital ID" option, and then click the "Next" button.
To validate the signatures, please click the "Protect" > "Manage Signatures" > "Validate All Signatures" button, it will pop up a Signature Validation Status message box which describes the validity of the signature.
To remove the signatures, please click the "Protect" > "Manage Signatures" > "Clear All Signatures" button, which will assist you in removing all of the digital signatures within a PDF file.
The signature feature allows you to sign PDF with a handwritten signature, including uploading an image signature, drawing a signature, and typing a handwritten signature.
Click the "Comment" > "Signature" button, and tap on the "+ Create" button to create your handwritten signature.
There are three options for adding a handwritten signature, including "Upload", "Draw", and "Type".