Offensive Security certifications are the most well-recognized and respected in the industry. Courses focus on real-world skills and applicability, preparing you for real-life challenges. Online, live, and in-house courses available.
5M7X has completed his DECT write-up, and it rocks. As DECT phone manufacturers rarely give any indication about their phone encryption capabilities, the only reliable way to check the security of your phone is to test it yourself.