You know how the United States is in desperate need of infrastructure work?

It's got some serious work with its digital infrastructure too.

Just look at Baltimore.

Tonight, it's a huge headache to complete a home sale in Baltimore, the city's computer

system that looks for property leans or debts to check for a clear title is locked up.

With last three weeks, city employees in Baltimore haven't been able to get into their email

accounts.

Residents haven't been able to pay water and electric bills, home sales have been significantly

delayed and it's all because of some hackers.

Hackers demanded 13 bitcoins worth about $100,000 for the code to unlock the system.

But Baltimore City Council president says the city won't pay the ransom.

People will pay ransom if they can leave something in the system and come back and shut

you down again and I just have to take the advice of the law enforcement and professionals.

The situation in Baltimore isn't a one off.

This is something that's been happening for a while now all over the country, all over

the world.

This is ransomware.

Rancemware is a type of malicious software.

When it enters your computer, your files are encrypted.

Renee Dudley is a senior reporter at ProPublica.

A ransom note pops up on your screen and you need to pay a ransom, generally speaking,

to get those files back.

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