Digital Certificates & Signatures :

A Guide to Digital Certificates & Digital Signatures

PDF In the ‘real world’ passports and ID cards identify people; crests or symbols identify institutions like the police or a hospital; and a seal or stamp authenticates a document. In the Digital World, we use Digital Certificates to do the same thing.

Digital certificates can be used for improved security where a username and password are used to login to any web application by introducing two factor authentication; they can also be used to secure the connection to any server using SSL certificates; and can be used for identity cards and even national ID cards.

Digital signatures can be used for sign PDF documents; a digital signature can be installed on a server for signing e-invoice, statement and other billing documents; and can also be used to secure the connection to authenticate legal transactions that occur over the internet.