Digital certificates are documents thanks to which we can associate a person and his/her public key officially, making it possible to associate a product, license or document to a company or person directly.
Create self-signed certificates
SelfCert is an application by means of which we can create certificates of authenticity and associate them by means of the X.509 v3 standard. It is only necessary to fill in a form (Certificate owner, email address, state/province, city, organization, serial number, RSA key,... ), provide the document with a password, that we can generate with SelfCert as well, turning out to be a job that's a lot simpler than it may have initially seemed.
You have to take into account that the certificates issued by SelfCert don't have any kind of value if the issuer isn't recognized by those that interact with him, because it isn't a certificate that has been validated by a certifying institution.