I'm afraid I lost my card key.

我恐怕我把卡式钥匙遗失了。

Take your card key.

请随身携带钥匙卡。

Please swipe your card key to enter this building.

你需要刷门禁卡才能进入这幢大楼。

Like urban public transport as IC CARDS, these CARDS to the public transport system, each card key encryption to have control of the factory.

就象城市公共交通IC卡一样，这些卡在交给公交系统使用前，每张卡的密钥都要进行出厂加密控制。

There is little paper about the key-management architecture during my development and research in the System of Education Card Key-management.

作者在教育卡密钥管理系统的研究和开发过程中，发现没有一套完整的、全面的、可信的密钥管理体系可供参考。