Traditional cryptography technology focused on the access control and confidentiality communications of digital products, but for authentication and copyright piracy tracing it is insufficient.
传统的密码学技术侧重于对数字产品的访问控制和保密通信，但是对版权认证和盗版追踪问题显得力不从心。
Traditional cryptography technology focused on the access control and confidentiality communications of digital products, but for authentication and copyright piracy tracing it is insufficient.
传统的密码学技术侧重于对数字产品的访问控制和保密通信，但是对版权认证和盗版追踪问题显得力不从心。
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