通过对呼叫数据进行加密、消息认证和数字签名，防止内部攻击，实现安全细粒度控制。
By the way of encryption, message authentication, and digital signature, the Call System can defense the interior attacks and achieves fine-grained security.
通过对呼叫数据进行加密、消息认证和数字签名，防止内部攻击，实现安全细粒度控制。
By the way of encryption, message authentication, and digital signature, the Call System can defense the interior attacks and achieves fine-grained security.
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