'''Certificate Authorities''' are trusted companies who issue digital certificates.<ref>[http://searchsecurity.techtarget.com/definition/certificate-authority SearchSecurity]</ref>
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==External Links==
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* Some reliable [https://spreadsheets.google.com/pub?key=ttwCVzDVuWzZYaDosdU6e3w&single=true&gid=0&output=html certificate authorities].