Absrtact: Access control has become a difficult and important question of the digital rights management.

摘要：访问控制问题是数字版权管理中的一个重要安全问题。

youdao

Absrtact: Access control has become a difficult and important question of the digital rights management.

摘要：访问控制问题是数字版权管理中的一个重要安全问题。

youdao