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'''Certificate Authority''' is a trusted third party company that issues digital certificates and public-private keys as a part of chosen Public Key Infrastructure ([[PKI]]). In order to issue these certificates, a CA first consults with a registration authority ([[RA]]) such as credit card company to check whether the requester's information is legitimate. Only after the proper verification can the CA issue a certificate claiming that the organization or the individual is the one it claims to be. Having a digital certificate on a website proves the owner's identity, hence developing a trustworthy environment in business.<ref>[http://www.webopedia.com/TERM/C/certification_authority.html WeboPedia]</ref>  

A '''Certificate Authority''' is a trusted third party company that issues digital certificates and public-private keys as a part of chosen Public Key Infrastructure ([[PKI]]). In order to issue these certificates, a CA first consults with a registration authority ([[RA]]) such as credit card company to check whether the requester's information is legitimate. Only after the proper verification can the CA issue a certificate claiming that the organization or the individual is the one it claims to be. Having a digital certificate on a website proves the owner's identity, hence developing a trustworthy environment in business.<ref>[http://www.webopedia.com/TERM/C/certification_authority.html WeboPedia]</ref>  

A certificate includes all the information about the owner, including his public key and the expiration date of the certificate.<ref>[http://searchsecurity.techtarget.com/definition/certificate-authority SearchSecurity]</ref>

A certificate includes all the information about the owner, including their public key and the expiration date of the certificate.<ref>[http://searchsecurity.techtarget.com/definition/certificate-authority SearchSecurity]</ref>

==Public Key Infrastructure==

==Public Key Infrastructure==