The department of homeland security in the USA said it was "aware of the media reports of a technology supply chain compromise" which alleged that dozens of firms had been compromised by the secret spy chip inserted during the manufacturing process.
The original report from Bloomberg last week claimed that the Chinese government had Super Micro include a rice-grain sized chip on its motherboards.
Because both are publicly traded companies, their public statements are subject to U.S. Securities and Exchange Commission regulations. "We are not under any kind of gag order or other confidentiality obligations".
Apple's Vice President for Information Security George Stathakopoulos wrote a letter to the House and Senate commerce committees that the company's security systems, which monitor for the type of malicious activity purported, had found nothing.
"Apple has never found malicious chips, "hardware manipulations" or vulnerabilities purposely planted in any server". In a Monday letter to Congress, Apple wrote that the claims in the Bloomberg story were "simply wrong".
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In another report , Bellingcat established that "Petrov" was specifically working for Russia's military intelligence, the GRU. Dr Mishkin was then recruited by the secretive GRU, where he was given the undercover identity of Alexander Petrov.
Both Elemental and Super Micro have also strongly denied the Bloomberg report.
The infiltration of the computer systems, which stemmed from servers assembled by Super Micro Computer Inc., was investigated as part of an Federal Bureau of Investigation counter-intelligence probe, according to national security officials familiar with the matter.
Apple contested the Bloomberg report on Thursday, saying its own internal investigations found no evidence to support the story's claims and that neither the company, nor its contacts in law enforcement, were aware of any investigation by the FBI on the matter. This is what had been alleged in a recent article by Bloomberg BusinessWeek.
DHS is backing them up.
And so far, no one has produced a Supermicro circuit board with a spy chip embedded in it. Bloomberg claimed that almost 30 companies were affected by the attacks, so you might expect someone at at least one of those companies to report finding a modified board-again, as far as we know, this hasn't happened.