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private key, this data only the CA's public key can be decrypted, and the CA's public key, the fame is very large, is installed in the operating system in advance! CA public key security and correctness, by the operating system maintenance, so if the system can be decrypted correctly, then the certificate must be issued by the CA, it will ensure that the server's unique identity!In iOS and Android, if the address of the access is HTTPS, and the certificate is not issued by the CA, then there wi
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