Cryptographic Access Control 密文访问控制
Encryption products checking, to control the export of cryptographic products containing strong encryption.
加密产品检查，以控制包含强加密的加密产品的出口。
Since you appear to have control only over the server, you cannot prevent the client from steering the conversation in a particular (cryptographic) direction.
既然你似乎控制只在服务器，你不能防止客户端在一个特定的话题转向（加密）方向。
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