The basis of trust between computer systems requires a 3rd party to have some sort of representation on each computer. The trusted root [[Trusted_Root_Certificate_Authority_(CA)#Digital_certificates|certificate]] is usually [[Trusted_Root_Certificate_Authority_(CA)#Distribution.2Finstallation_of_root_CA_certificates|installed]] in a special folder by most of the operating systems and browsers.
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=== Early CA infrastructure ===
=== Early CA infrastructure ===
There were several early problems that led to the need for having multiple CAs in the client-side trusted root folder.
There were several early problems that led to the need for having multiple CAs in the client-side trusted root folder.