_ means a person who has been granted a license to issue an electronic signature certificate.

The term you're looking for is "Certifying Authority" (CA). A certifying authority is an entity that issues digital certificates, which are used to create secure communication channels over the internet. This includes technologies like SSL/TLS certificates that secure web transactions and electronic signatures.

A certifying authority verifies the identity of the entity requesting a digital certificate and then issues a certificate that binds the entity’s identity to a public key. The identity can be that of a person, organization, or device. By using electronic signatures and certificates, CAs play a critical role in public key infrastructure (PKI), ensuring the trustworthiness of digital transactions and communications.

In summary, a certifying authority is essential in managing encryption keys, providing identity verification, and enabling secure electronic transactions.