User manual

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your vendor/ISP/ITSP.
6.12.2 Trusted CA
CA is the abbreviation for Certificate Authority. CA is a part of the X.509 system. It
is itself a certificate, attached with the owner information of this certificate authority.
But its purpose is not to do encryption/decryption. Its purpose is to sign and issue
certificates; in order to prove the owner information of that certificate is correct.