A public key is a cryptographic key that is used in asymmetric encryption to encrypt data or verify signatures; it can be shared openly. A public certificate, on the other hand, is a digital document that binds a public key to an individual or entity's identity, often issued by a trusted Certificate Authority (CA). While the public key is a component of the certificate, the certificate also includes information such as the owner's identity, the CA's signature, and validity dates, ensuring the authenticity and integrity of the public key.
One can receive a PKI certificate, or a public-key infrastructure certificate, is by digitally signing and publishing the public key bound to a given user.
Embedding the public key in a digital certificate protects it from impersonators by associating and binding a user's identity to the public key. A digital certificate is the user's public key that has been "digitally signed" by a trustworthy source trusted to sign it. And, instead of "trustworthy" you could use the word: reputable.
Certificate Server (CS)
PKI or Public Key Infrastructure
certificate authority
There is no difference.
digital certificate (aka digital ID, digital signature)
The main difference between public wants and private wants in business is the key words private and public. Private is personal clientele and their personal needs such as jets, hotels, and restaurants. Public wants are governments costs, marketing, and such.
Cross-Certificates OverviewA cross-certificate is a certificate issued by one Certificate Authority (CA) that signs the public key for the root certificate of another Certificate Authority. Cross-certificates provide a means to create a chain of trust from a single, trusted, root CA to multiple other CAs.
digital certificate
digital certificate
A digital certificate typically contains the subject’s name, the public key associated with the subject, the certificate authority's (CA) name, the digital signature of the CA, and the certificate's validity period. It may also include information about the certificate's purpose and the algorithms used for encryption. This information helps establish the identity of the certificate holder and ensures secure communications over networks.