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[[Image:UnderConstruction.png]]
[[Image:UnderConstruction.png]]
'''Certificate Authorities''' are trusted third party companies who issue digital certificates and public-private keys for encryption of messages. 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 legit. Only after the proper verification, the CA can issue a certificate claiming that the organization of the individual is the one who he claims to be. Having a digital certificate on a website proves the owners identity hence developing a trustworthy environment in business.<ref>[http://www.webopedia.com/TERM/C/certification_authority.html WeboPedia]</ref>
'''Certificate Authorities''' are trusted third party companies who issue digital certificates and public-private keys for encryption of messages. 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 legit. Only after the proper verification, the CA can issue a certificate claiming that the organization or the individual is the one who he claims to be. Having a digital certificate on a website proves the owners 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, 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 his public key, the expiration date of the certificate.<ref>[http://searchsecurity.techtarget.com/definition/certificate-authority SearchSecurity]</ref>
==External Links==
==Authentication==
Almost all the browsers present today are able to detect if certificate of certain website is expired or it does not have the certificate signed by a known company. In that case a warning message usually appears on the first page saying the problem with the certificate. One can then move on to the website or leave the page right there.
[[VeriSign]] and [[DigiCert]] are two known companies in the field of digital certificates. Rest of the reliable companies' list can read [https://spreadsheets.google.com/pub?key=ttwCVzDVuWzZYaDosdU6e3w&single=true&gid=0&output=html here].<ref>[http://www.namecheap.com/support/knowledgebase/article.aspx/334/38/what-is-certificate-authority-ca NameCheap]</ref>
==References==
==References==