Applying the modern cryptographical technology constructs two digital copyright protection schemes.
利用现代密码技术构造了两个数字版权保护方案。
2
VPN cryptographical system is concerned with cryptographical technology, authentication technology and VPN implementation protocols.
VPN密码系统的构建涉及几个方面的技术，包括加密技术、认证技术、实现协议等。
3
The problem of digital copyright protection is taken into account by more and more people. Cryptographical technology is one of the key solutions to this problem.