The realization of satellite-to-ground quantum cryptography would make quantum-secured communications possible on a global scale. Four recent breakthroughs suggest that this compelling capability could be achieved by the end of this decade.

中文翻译：

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自由空间通信：量子空间竞赛升温

卫星对地面量子密码术的实现将使在全球范围内进行量子安全的通信成为可能。最近的四项突破表明，这种引人注目的功能可以在本十年末实现。