KUSA – The Department of Homeland Security is urging states to improve their election security after hackers targeted voter registration systems in more than 20 states.

Homeland Security Secretary Jeh Johnson said Friday “one or two” of the efforts to hack into those systems had been successful.

"I've been out there publicly engaging with state and local election officials encouraging them to come to us for our cyber security expertise to help secure their own systems,” Johnson said during an interview Friday on Morning Joe.

At a hearing earlier this week, Johnson told lawmakers 18 states had come forward asking the Department of Homeland Security for help with cyber security.

Colorado Secretary of State Wayne Williams told 9NEWS he’s confident Colorado’s online voter registration system is secure.

“Colorado has a number of security procedures in place including what our clerks access with two-factor authentication,” Williams explained. “So we work very hard to ensure the security of that.”

If hackers were to breach Colorado’s voter registration they would potentially have access to personal information like one’s date of birth and driver’s license information.

Williams said he believes Colorado’s security procedures are as “tough as they possibly can be.” He also pointed out the difference between Colorado’s online voter registration system and the system voters will use on Election Day.

“Colorado rules require specifically that the voting systems, the actual systems on which people vote and on which ballots are tabulated are stand-alone systems – that is they are not connected to the internet.”

Williams said Colorado voters should have “complete confidence” in the voting tabulation system that’s used in Colorado, adding that there’s a paper record for every vote cast in the state.

“There is not a way for an individual in Russia, or Boston, or wherever to access the voting systems in Colorado,” Williams said.