This paper discusses the issues of implied trust in ethical hacking. Ethical hackers are considered to be professionals and experts in their field. It is well documented that there is an implied trust toward professionals who are entrusted to undertake a task. Like many similar professions, such as ICT and computer forensics, there is no uniform or mandated code of ethics that an ethical hacker must adhere to. Given the nature of hacking and the potential for misuse and access to sensitive and confidential information, the need to ensure professionalism is maintained through ensuring competence and ethical behaviour is critical.