Answer
People
Step-by-step explanation
Information system security is the protection of information and the information systems from the unauthorized access use, disclosure, disruption, modification, or destruction by the people who have negative minds concerning the data in the these systems. This is done by employing the information security management process. This helps in protecting the information assets.
People are greatest, ongoing security risk to the information systems because they are the ones who manages these systems and they can access them for the purpose of their own benefits without the knowledge of the company. Also hackers are a high risk to the systems because they have a ability to interfere with the systems and get the information they require