Is when a hacker prevents you from accessing your files and asks that you pay money to give you back access. It's NOT guaranteed that you'll have access to your files after payment.

Ransomware

Explanation:

Ransomware is a cyber-computer term that describes a cryptic-associated cyber attack on people's account or personal related information, which prohibits the victim to gain access to those accounts or files such as social media account, and then demand certain sum to be paid before granting access. At the same time, payment doesn't ensure actual access by the victim to such an account.

Hence, in this case, the correct answer is RANSOMWARE

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