Trilha Forte Certificados Digitais

Good morning. I work with Digital Certificates exclusively for Serasa and I am starting an operation in Chile and soon over in Portugal and usa. The Digital Certificate allows a person to sign personal documents or the Company, from any part of the world, with the same legal validity, without having to return to Brazil, avoiding cost with displacements, notaries, motoboy, post office and etc. in addition to safety cryptography in sending data. Every company is required to have a digital certificate to carry out its obligations with the State, in access to the Internal Revenue Service, Invoices and others, that is, without Digital Certificate, the company does not issue NF-e I need a link so that the Brazilian resident in Chile (initially), can enter and buy (in dollar) and my company receive here in Brazil, in our currency. The Digital Certificate is a Tokem or file installed on the computer, where the user selects to sign documents and that signature has all Legal validity. How can I get this link?