#### Answer Description

Browser load web certificates when a web server uses the HTTPS protocol. The certificate given to the browser will always be the public certificate, which will contain the public key. The private key is kept by the administrator who created the certificate and should never be shared.

#### Wikipedia

Public-key cryptography, or asymmetric cryptography, is a cryptographic system which uses pairs of keys: public keys (which may be known to others), and private keys (which may never be known by any except the owner) The generation of such key pairs depends on cryptographic algorithms which are based on mathematical problems termed one-way functions Effective security requires keeping the private key private the public key can be openly distributed without compromising securityIn such a system, any person can encrypt a message using the intended receiver's public key, but that encrypted message can only be decrypted with the receiver's private key

Public-key cryptography - Wikipedia, the free encyclopedia