ATLANTA — As the government shutdown becomes the longest in U.S. history, the country becomes more vulnerable. 

According to NetCraft, an internet services company, over 80 government websites have expired security certificates. This means those websites are not secure or they're inaccessible. 

For example, the U.S. Department of Justice website says it will not be updated regularly. The U.S. Court of Appeals website says "not secure" in the browser. 

U.S. Court of Appeals for the Federal Circuit website
U.S. Court of Appeals for the Federal Circuit website

It's unclear how long the shutdown will last, so obviously, it remains unclear how long the websites will be down, unsecured or, in some cases, vulnerable to hackers. 

As for other areas of concern, the Transportation Security Administration remains understaffed due to strikes making many wonder if it's safe to board a plane.

A TSA spokesperson tweeted on Friday that 99.9 percent of passengers waited less than 30 minutes to get through security. So, while waits might get slower, TSA is still effective as of Saturday.

► Shutdown day 22: This is now the longest government shutdown in US history
► Air traffic controllers sue government over no pay during shutdown
► Congress approves back pay for federal workers once shutdown ends