Parameterized queries are a technical control that can help prevent injection flaws by separating SQL code from data. This makes it harder for an attacker to inject malicious input that could alter the execution of a SQL query. Using encrypted channels addresses the confidentiality and integrity of the data in transit, but not the injection vulnerability itself. Input length restrictions can prevent buffer overflow attacks but would not necessarily prevent injection attacks. Role-based access control is a good practice for limiting user permissions based on their role, but it does not directly mitigate the vulnerability of unsanitized user input.