A digital certificate system: Group of answer choices uses digital signatures to validate a user's identity. is used primarily by individuals for personal correspondence. uses tokens to validate a user's identity. uses third party CAs to validate a user's identity. protects a user's identity by substituting a certificate in place of identifiable traits.

uses third party CAs to validate a user's identity

Explanation:

The Digital Certificate is the only means that technically and legally guarantees the identity of a person on the Internet. This is an essential requirement for institutions to offer secure services over the Internet. Further:

The digital certificate allows the electronic signature of documents The recipient of a signed document can be sure that it is the original and has not been tampered with and the author of the electronic signature cannot deny the authorship of this signature.

The digital certificate allows encryption of communications. Only the recipient of the information will be able to access its content.