Chapter 6 . Securing Linux 233 trusted (Web hosting solutions) third
Chapter 6 . Securing Linux 233 trusted third party to vouch for your identity. To ensure that a certificate is immutable, it has to be signed by a trusted third party when the certificate is issued and validated every time an end user taking advantage of your secure site loads it. The following is a list of the trusted third-party certificate signers: . GlobalSign https://www.globalsign.net/ . GeoTrust https://www.geotrust.com/ . VeriSign https://www.verisign.com/ . FreeSSL http://www.freessl.com/ . Thawte http://www.thawte.com/ . EnTrust http://www.entrust.com/ . ipsCA http://www.ipsca.com/ . COMODO Group http://www.comodogroup.com/ Because of the fluid nature of the certificate business, some of these companies may not be in business when you read this, while others may have come into existence. To get a more current list of certificate authorities, from your Mozilla Firefox browser select Edit.Preferences. From the Preferences window that appears, select Advanced.Manage Certificates. From the Certificate Manager window that appears, refer to the Authorities tab to see Certificate Authorities from which you have received certificates. Each of these certificate authorities has gotten a chunk of cryptographic code embedded into nearly every Web browser in the world. This chunk of cryptographic code allows a Web browser to determine whether or not an SSL certificate is authentic. Without this validation, it would be easy for crackers to generate their own certificates and dupe people into thinking they are giving sensitive information to a reputable source. Certificates that are not validated are called self-signed certificates. If you come across a site that has not had its identity authenticated by a trusted third party, your Web browser will display a message similar to the one shown in Figure 6-2. Figure 6-2: A pop-up window alerts you when a site is not authenticated. Note
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