Entanglement-based secure quantum cryptography over 1,120 kilometres

Using the “Micius” satellite, researchers achieved entanglement-based quantum key distribution (QKD) between two ground observatories in Delingha and Nanshan (China), separated by 1,120 kilometres. The QUESS satellite (Quantum Experiments at Space Scale, nicknamed Micius after the ancient Chinese scientist) is the world’s first quantum communication satellite.
Credits
Research: Entanglement-based secure quantum cryptography over 1,120 kilometres
Juan Yin, Yu-Huai Li, Sheng-Kai Liao, Meng Yang, Yuan Cao, Liang Zhang, Ji-Gang Ren, Wen-Qi Cai, Wei-Yue Liu, Shuang-Lin Li, Rong Shu, Yong-Mei Huang, Lei Deng, Li Li, Qiang Zhang, Nai-Le Liu, Yu-Ao Chen, Chao-Yang Lu, Xiang-Bin Wang, Feihu Xu, Jian-Yu Wang, Cheng-Zhi Peng, Artur K. Ekert & Jian-Wei Pan
Nature (2020), DOI: 10.1038/s41586-020-2401-y
Video footage: China Central Television (CCTV)
Micius satellite
QUESS satellite
Quantum satellite

[noecarrier]

The Encryption Catastrophe beckons. Fancy stuff. They've been working on this for years now, nice to see they're achieving successes.

[ssaimun]

Mozi (Mo Tzu: ca。 490-403 BC) was China's first true philosopher。 Mozi pioneered the argumentative essay style and constructed the first normative and political theories。
He formulated a pragmatic theory of language that gave classical Chinese philosophy its distinctive character。 Speculations about Mozi's origins highlight the social mobility of the era。
The best explanation of the rise of Mohism links it to the growth in influence of crafts and guilds in China。 Mohism became influential when technical intelligence began to challenge traditional priestcraft in ancient China。
The "Warring States" demand for scholars perhaps drew him from the lower ranks of craftsmen。 Some stories picture him as a military fortifications expert。
His criticisms show that he was also familiar with the Confucian priesthood。
The Confucian defender, Mencius, (371-289 BC) complained that the "words of Mozi and Yang Zhu fill the social world。
" Mozi advocated utilitarianism (using general welfare as a criterion of the correct daoguiding discourse) and equal concern for everyone。
The Mohist movement eventually spawned a school of philosophy of language (called Later Mohists) which in turn influenced the mature form of both Daoism (Zhuangzi ca 360 BC) and Confucianism (Xunzi 298-238 BC)。

[ilcipo]

At the min 1:47 he talks about 40000 keys .... the english translations doesn't make sense. Is it 40Kbps key distribution speed? Meaning they can distribute 40k bits per sec between the two stations? or what?

[peterfranks-ue]

Clearly there is considerable gap between the risk that we face today and when quantum security is a deployable option. This does also not appear to address the threat posed by the future decryption of encrypted data which is stolen today.

[LOLxPRO]

audio gain is terible in my note 10 audio level is very low