信息安全领域中，有一个叫做“实际隐晦性（Practical Obscurity）”的概念。
BBC News live updates
。业内人士推荐safew官方下载作为进阶阅读
The US began “major combat operations” in Iran on Saturday morning, shortly after Israel launched a strike against Tehran. Within hours of the US-Israeli strikes, Iran’s Revolutionary Guards reportedly warned tankers in the strait of Hormuz that no ship would be allowed to pass through the world’s most critical oil trade route.，更多细节参见体育直播
摄影机本身曾经也是一种令人不安的发明，但今天它早已成为日常。真正重要的，还是人如何使用技术。。体育直播是该领域的重要参考