This paper proposes an efficient hybrid multicast key management scheme to solve the problem of high key update cost in large dynamic multicast group.

针对大型动态群组组播通信密钥更新开销大的问题，提出一种高效的混合组播密钥管理方案。

youdao

You can choose to take a high-key or low-key approach, and expose to emphasize certain areas of an image over others.

这可以是件好事，因为你可以选择高调拍摄或者低调拍摄，用曝光来强调一些部分并弱化其他部分。

youdao

but the noise steadily increased. I arose and argued about trifles, in a high key and with violent gesticulations;

VOA: special.2009.02.02

Iran is played host to a high-profile summit of two key war-torn neighbors, Pakistan and Afghanistan, in a bid to put an end to conflicts that rage along its borders.

VOA: standard.2009.05.24

The F800EXR has six new filters: Pop Color, Toy Camera, Miniature, High Key, Partial color and Dynamic Tone.

ENGADGET: Fujifilm unwraps FinePix F800EXR camera with wireless sharing to Android, iOS

The three new cameras all come equipped with Picture Effect settings that make it easy to spice up photos, movies and panoramas instantly and automatically with a range of fun, impressive artistic treatments like Toy Camera, Pop Color, Soft High Key and Partial Color.

ENGADGET: Sony brings Cyber-shot HX300, WX300 and TX30 to the US with fast autofocus

The full list of effects includes Toy Camera, Partial Color, Pop Color and Soft High-key.

ENGADGET: Sony keeps on rocking the Cyber-shot with three new models