A company was a victim of bucket squatting. What process would help to prevent this type of attack?

Identity verification addresses authentication of users or principals but does not prevent an external attacker from claiming an abandoned public bucket name in a cloud provider namespace.

Unique bucket classification is not a defined cloud security control and does not address the core problem of bucket name re-registration after deletion.

Private bucket creation ensures that even if an attacker squats a bucket name, the bucket's access control policies deny public read and write access, preventing the attacker from receiving or serving data intended for the original bucket. This is the most direct technical control because bucket squatting relies on the squatted bucket being publicly accessible to intercept or serve malicious content.

File evaluation refers to inspecting contents of files and does not prevent an attacker from registering and controlling a squatted bucket.