After the issuance of a certificate by a certification authority, an entire system known as Certificate Transparency (CT) or Digital Certificates Authority (DCA, to use a common acronym) is necessary to monitor both who has verified that the certificate has been issued and what has been done with it. Currently, the majority of certificates are issued on a trust model known as the “Plessy test”, which states that a certificate cannot be issued to an applicant for whom there is no other acceptable certification record in the Internet root zones, where most of the current web browsers and other major computer network operating systems reside. We build a small, efficient, and robust system that verifies certificates and their underlying signatures over a standard communication channel between certificate authorities and the certificate's issuer. We show that when an attacker is able to forge the intermediate steps in the certificate chain from a compromised certificate authority, the system can validate certificates and their signatures without a key that is also compromised. This research builds on the work of Ben Laurie and Michael Fla hive, who pioneered the use of distributed signatures to authenticate the identity of certificate authorities. Document Management with Intranet Digital Signature
Create a new folder for quick access and use the folder to store personal and enterprise documents that you need to access with Intranet signature. You’ll only need this folder when:
you have personal documents that you want to have stored electronically;
your documents are protected by Intranet signature;
the owner trusts you and asks you to store their sensitive documents online;
you have to access sensitive documents at the workplace or other locations where employees have restricted access. How Intranet signature Works
When you connect to your Intranet through Intranet signature, you’ll gain access to:
your documents at the workplace
secure email
your home folders
the Intranet Gallery
A searchable archive of all your documents. If you want to use multiple users per folder, use the Multiple User Account Settings to create one user account per folder.. Add PDF to an existing file, import from your existing account, or create a new one. You can sign your documents from within an app, or by using the built-in PDF signature solution. Sign an image, a PDF, or a text document on your Mac or iPhone, and save your signature (and other data) to an external file or PDF. You can view your entire iCloud Document Library—PDF, image files, and text documents—in Safari on the web, or you can click on a link to view one document. The built-in PDF signature solution lets you sign, edit, and print public documents, while keeping your private signature information private.