Its used to prove you are who you say you are.
The purpose of certificate security is to ensure the authenticity, integrity, and confidentiality of digital communication. Certificate security involves using digital certificates to verify the identity of individuals, websites, or systems and establish secure communication channels. It helps protect against impersonation, data tampering, and eavesdropping, ensuring that information exchanged over the internet remains secure and trustworthy.
A Digital Signature Certificate, is a digital identity of the sender filing the documents through internet .Digital Signature Certificate is a digital equivalent of a hand written signature which has an extra data attached electronically to any message or a document.
Digital Certificate
digital certificate (aka digital ID, digital signature)
Extended Validation Certificate.
A digital certificate confirms the information has come from the source it's claimed to be, and that the site is encrypted for transactions to be exchanged.
Digital ID, also known as a digital certificate, is a form of electronic credentials for the Internet. Digital certificate is issued by a trusted third party to establish the identity of the ID holder. The third party who issues certificates is known as a Certification Authority (CA). Digital certificate technology is based on the theory of public key cryptography. In public key cryptography systems, every entity has two complementary keys, a public key and private key, which function only when they are placed together. The purpose of a Digital ID is to reliably link a public/private key pair with its owner. When a CA issues Digital IDs, it verifies that the owner is not claiming a false identity. For more information, see the related link.
Certificate in digital applications CiDA
Digital certificates are verified through the use of another certificate, creating a chain of certificates that ends with the root certificate The issuer of a certificate is called a certification authority (CA). The owner of the root certificate is the root certification authority.
The purpose of a certificate holder is to display a certificate one has earned in an attractive fashion. Several designs of certificate holders are available to showcase, for example, diplomas, awards and marriage certificates.
Certification Authority example: Verisign
the web site's Digital Certificate