  After the rise of E-commerce, social media and messenger bots, rapid
developments have been made in the field of connecting things, gadgets, and
devices, i.e, the Internet of Things (IoT). In the fast-paced lifestyle, it is
very difficult to maintain multiple keys for traditional mechanical locks.
Electromagnetic smart locks are a possible solution to this problem. To connect
a smart lock with a key, Bluetooth Low Energy (BLE) protocol can be used. BLE
protocol is vulnerable to Man-in-the-Middle (MITM) attack. Ensuring security
over BLE is an ongoing challenge. This paper aims to analyze the MITM
vulnerability of BLE and develop a possible solution for designing smart-locks
with an increased level of security. The observation shows that the combination
of Image Steganography and Cryptography helps to overcome the vulnerabilities
of BLE protocol.
