虽然与之前相比，其安全性有所提高，但当面临安全攻击(被动攻击和主动攻击)时，整个网络系统的安全性仍然亟待提高。

Although compared with the previous, improved their safety, but when faced with security attacks (passive attacks and active attacks), the whole network system security still needs to be improved.

youdao

虽然与之前相比，其安全性有所提高，但当面临安全攻击(被动攻击和主动攻击)时，整个网络系统的安全性仍然亟待提高。

Although compared with the previous, improved their safety, but when faced with security attacks (passive attacks and active attacks), the whole network system security still needs to be improved.

youdao