prolific

 https://www.google.com/search?q=prolific+hacker

filter

https://www.google.com/search?q=filter

https://www.google.com/search?q=filtrate

https://www.google.com/search?q=inflitritate

different

 https://www.google.com/search?q=attack+different

measures

 https://www.google.com/search?q=security+measures

concerns

 https://www.google.com/search?q=security+concerns

user

 https://www.google.com/search?q=user+security

flaw

 https://www.google.com/search?q=security+flaws

brute

 https://www.google.com/search?q=brute+force

response

 https://www.google.com/search?q=threat+response

comprise

 https://www.google.com/search?q=secure+comprise

breach

 https://www.google.com/search?q=secure+breach