Chinese hackers have attacked the US weather satellite network, causing services to be sealed off for a period.
The US regularly accuses China of state sponsored assaults on its businesses, industries and utilities.
The US is currently talking of a cooling in trade hostilities that would ensure the smooth passage of technology sales, but the cyber attack allegations still keep coming. The Washington Post reported that the weather satellite attacks happened in September, but were not revealed until late October.
Cyber security is an irritant to bilateral ties. On Wednesday the U.S. Federal Bureau of Investigation said hackers it believed were backed by the Chinese government had launched more attacks on U.S. companies, a charge China rejected as unfounded.
In May, the United States charged five Chinese military officers with hacking American firms, prompting China to shut down a bilateral working group on cyber security.
Job interviews missed, work and wedding plans disrupted, children unable to fly home with their adoptive parents -- the consequences keep proliferating in the aftermath of a database outage that crippled the US State Department's process for issuing passports, visas, and other documents related to travel to the US.
A new Senate proposal to curb the government's bulk collection of Americans' telephone records and increase transparency about the program has White House backing, and may get more traction with critics who have dismissed other bills as too weak.
Democrat senator Patrick Leahy, chairman of the Senate Judiciary Committee, introduced the legislation in the United States upper house yesterday.
A sophisticated group of hackers believed to be associated with the Chinese government, who for years targeted U.S experts on Asian geopolitical matters, suddenly began breaching computers of experts on Iraq as the rebellion there escalated, a security firm said on Monday.
CrowdStrike Inc said that the group is one of the most sophisticated of the 30 it tracks in China and that its operations are better hidden than many attributed to military and other government units.