Where can I buy ARB coins?

As a keen investor in the cryptocurrency market, I'm wondering about the accessibility of ARB coins. Could you please elaborate on the various platforms or exchanges where one can purchase ARB coins? Additionally, are there any specific requirements or steps that need to be followed in order to acquire these coins? Furthermore, I'm curious about the security measures these platforms take to ensure the safety of transactions and user data. Your insights into these matters would be greatly appreciated.