Digital Certificate Operation in a Complex Environment

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Assurance Levels Certificate Policies often define different levels of security assurance. For example it might not be appropriate to store your biscuit recipes in a hardware cryptographic module or to do your online banking using an unencrypted public network. To allow you to choose the "right" level of security, PKI allows certificates with different security levels.
'Rudimentary' or 'Basic' levels might be choosen if security requirements are not very high. For example in a 'rudimentary' security level your certificates and keys might be generated centrally and then delivered to you by email or on a floppy disk. Higher level assurance levels most likely will require hardware cryptography modules for all components within a PKI, including CA, RA and all end-entities.
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