Secure Elections Act This bill gives the Department of Homeland Security (DHS) primary responsibility within the federal government for sharing information about election cybersecurity incidents, threats, and vulnerabilities with federal entities and election agencies. DHS shall establish an advisory panel of independent experts to develop guidelines on election cybersecurity, including standards for procuring, maintaining, testing, auditing, operating, and updating election systems. DHS shall award election system cybersecurity and modernization grants to states to implement the advisory panel's guidelines. Grants shall be awarded to: (1) remediate vulnerabilities identified by a cybersecurity evaluation, (2) replace electronic voting systems that are not optical scanners that read paper ballots, and (3) reimburse states for the inspection of marked paper ballots. DHS shall establish a Hack the Election program, including a recurring competition, to facilitate and encourage the identification and reporting of election cybersecurity vulnerabilities by independent technical experts.