Security

Essential PDF also has support for setting the security of the generated PDF document.

Essential PDF supports signing of both existing and new documents.

In general digital signatures are used to authenticate the identity of a user and the document content. It stores information about the signer and the state of the document when it was signed. When enterprises distribute documents electronically, it is often important that recipients can verify:

• That the content has not been altered. (integrity)
• That the document is coming from the actual person who sent it. (authenticity)
• That an individual who has signed the document cannot deny the signature. (non-repudiation)

A PDF document may contain the following standard types of signatures: One or more document (or ordinary) signatures. These signatures are sometimes referred to as 'recipient signatures'. At most one MDP (modification detection and prevention) signature. This signature is also referred to as an 'author' or 'certifying' signature.

Essential PDF provides support for both types of signatures.

Here is the screenshot of Standard signature.

Here is the screenshot of Certify signature.

Essential PDF has capability for encrypting a PDF document with 40/128-bit encryption to protect its contents from unauthorized access. It also provides support for restricted document operation for intended users.