Arizona’s secretary of state on Thursday warned the state’s largest county not to try to use election machines that are being audited or she would decertify the equipment. “I have grave concerns regarding the security and integrity of these machines, given that the chain of custody, a critical security tenet, has been compromised and election officials do not know what was done to the machines while under Cyber Ninjas’ control,” Arizona Secretary of State Katie Hobbs, a Democrat, wrote in a letter to Maricopa County officials. Auditors hired by the Arizona Senate, including Cyber Ninjas, have been reviewing over 2 million ballots cast and 385 tabulators used in the 2020 election, along with other materials. Auditors have said they’re following strict forensics protocols. “We don’t turn on a system if it’s delivered to us in a powered-off state. We remove the hard drives, we perform forensics imaging with write blocks to …