China envi\u00f3 un c\u00f3digo “inquebrantable” desde un Sat\u00e9lite,\u00a0se\u00f1alando que es la primera vez que la tecnolog\u00eda de distribuci\u00f3n cu\u00e1ntica desde el espacio a la tierra se ha realizado. El sat\u00e9lite envi\u00f3 claves cu\u00e1nticas a estaciones terrestres en China entre 645 km (400 millas) y 1.200 kil\u00f3metros (745 millas) de distancia a una velocidad de transmisi\u00f3n de hasta 20 \u00f3rdenes de magnitud m\u00e1s eficiente que una fibra \u00f3ptica, indic\u00f3 Pan Jianwei, cient\u00edfico principal en China. El mismo es un\u00a0experimento de la Academia China de Ciencias. Esto abre\u00a0enormes perspectivas para que esta nueva generaci\u00f3n de comunicaciones pueda\u00a0ser aplicada\u00a0en defensa y finanzas.<\/p>\n
BEIJING (Reuters) – China has sent an “unbreakable” code from a satellite to the Earth, marking the first time space-to-ground quantum key distribution technology has been realized, state media said on Thursday.<\/p>\n
China launched the world’s first quantum satellite last August, to help establish “hack proof” communications, a development the Pentagon has called a “notable advance”.<\/p>\n
The official Xinhua news agency said the latest experiment was published in the journal Nature on Thursday, where reviewers called it a “milestone”.<\/p>\n
The satellite sent quantum keys to ground stations in China between 645 km (400 miles) and 1,200 km (745 miles) away at a transmission rate up to 20 orders of magnitude more efficient than an optical fiber, Xinhua cited Pan Jianwei, lead scientist on the experiment from the state-run Chinese Academy of Sciences, as saying.<\/p>\n
“That, for instance, can meet the demand of making an absolute safe phone call or transmitting a large amount of bank data,” Pan said.<\/p>\n
Any attempt to eavesdrop on the quantum channel would introduce detectable disturbances to the system, Pan said.<\/p>\n
“Once intercepted or measured, the quantum state of the key will change, and the information being intercepted will self-destruct,” Xinhua said.<\/p>\n
The news agency said there were “enormous prospects” for applying this new generation of communications in defense and finance.<\/p>\n
China still lags behind the United States and Russia in space technology, although President Xi Jinping has prioritized advancing its space program, citing national security and defense.<\/p>\n
China insists its space program is for peaceful purposes, but the U.S. Defense Department has highlighted its increasing space capabilities, saying it was pursuing activities aimed at preventing adversaries from using space-based assets in a crisis.<\/p>\n