In this case, it is reasonable to consider that the variations caused by the switching controller will not significantly contribute for the poor perception of malicious and covert interferences that would naturally not be perceived by a human observer (even when a non-switching controller is used).
Congress has announced bipartisan investigations and Obama ordered a comprehensive report on covert foreign interference into U.S. presidential elections going back to the 2008 election.
"His comment suggested — falsely — that a report released by U.S. intelligence agencies in January had ruled out any impact that could be attributed to a covert Russian interference campaign that involved leaks of tens of thousands of stolen emails, the flooding of social media sites with false claims and the purchase of ads on Facebook". — McCain suggests White House subpoena.
"It's rising Iranian interference and covert activities throughout the region, in addition to their missile and nuclear programs," Mr. Gates said.
In addition to numerous Justice Department prosecutions of Russians for election interference and other covert operations, the United States and its allies have imposed sanctions on prominent Russians and kicked out dozens of Russian diplomats after the poisoning in March of a former Kremlin spy in Britain.
In our earlier publications, simulation results demonstrate that the noise modulated covert communication system maintains good performance in white Gaussian noise channels, and indoor experiments prove that the system can retrieve messages in interference-free channels [15, 16].
Indeed, in a pinch, the "external aggression" concept trotted out by Makdissi could be easily stretched to encompass the various forms of foreign interference, such as the covert funding and arming of Syria's rebels (reportedly by the U.S., Turkey, Qatar, Saudi Arabia, and various European countries including Great Britain and France), that is currently occurring.
While Pompeo has made it a top priority to rebuild the C.I.A.'s capabilities to collect intelligence in Russia, the White House has so far balked at authorizing an aggressive covert campaign to punish Moscow for its interference in the 2016 election.
Although the authors of [12] use this example in their paper, it is worth mentioning that the concept of a physically covert attack can be extended to other interferences where, as defined in [12], the physical effects cannot be easily noticed or identified by a human observer, or can eventually be understood as a consequence of another cause, other than an attack.
