The com.adobe.livecycle.signatures.client package enables your organization to protect the security and privacy of Adobe PDF documents that it distributes and receives. This LiveCycle service uses digital signatures and certification to ensure that documents cannot be altered by anyone other than the intended recipients. Because security features are applied to the document itself, the document remains secure and controlled for its entire life cycle; including beyond the firewall, when it is downloaded offline, and when it is submitted back to your organization.