Ray Felch // Recently, it was suggested that it would be cool to create a hardware badge for one of the upcoming InfoSec conferences. Admittedly, I have a pretty solid […]

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Ray Felch // This write-up is the first of a multi-part series, providing an introduction to LoRa wireless technology and the LoRaWAN, low-power wide-area network (LPWAN). Interestingly, I came across […]

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Ray Felch // Preface: Recently, I acquired a few home automation devices, so that I might research Zigbee and get a better understanding of how this very popular wireless technology […]

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Ray Felch // Introduction  Recently, I came across an interesting article on using software-defined radio (SDR) to create a Police, Fire, EMS, and Public Safety systems scanner. Viewing a few of these Trunk […]

The post Using SDR to Build a Trunk Tracker – Police, Fire, and EMS Scanner appeared first on Black Hills Information Security, Inc..

Ray Felch // Disclaimer  When using an FM transmitter, do not modify the intended operation of the module by amplifying the transmitted signal. Also, be sure that attaching an FM high gain […]

The post Information From Thin Air: Using SDR to Extract DTMF from Radio Waves appeared first on Black Hills Information Security, Inc..

Ray Felch // Overview  Infrared technology has been around for a very long time and is a wireless technology used in devices that convey data by way of Infrared radiation. […]

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Ray Felch // Introduction While packing up my KeyWe Smart Lock accessories, and after wrapping up my research and two previous blogs “Reverse Engineering a Smart Lock” and “Machine-in-the-Middle BLE […]

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Ray Felch // Introduction Continuing with my ongoing Smart Lock attack research (see blog Reverse Engineering a Smart Lock), I decided to move my focus to a different type of […]

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Ray Felch // INTRODUCTION Recently I was afforded the opportunity to research the findings of a well-known security firm (F-Secure), who had discovered a vulnerability in the Guardtec KeyWe Smart […]

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Ray Felch // Introduction: After completing and documenting my recent research into keystroke injections (Executing Keyboard Injection Attacks), I was very much interested in learning the in-depth technical aspects of […]

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Ray Felch // Preface: Following the work of the Bastille Research Group (See: https://github.com/BastilleResearch/mousejack), I was interested in knowing if these (keyboard injection) vulnerabilities were still valid. To my surprise, […]

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Ray Felch // SOFTWARE DEFINED RADIO: RF Signal Replay Techniques Disclaimer: Be sure to use a faraday bag or cage before transmitting any data so you don’t accidentally break any […]

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Ray Felch // Disclaimer: Be sure to use a faraday bag or cage before transmitting any data so you don’t accidentally break any laws by illegally transmitting on regulated frequencies. […]

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Ray Felch // Disclaimer: Be sure to use a faraday bag or cage before transmitting cellular data so you don’t accidentally break any laws by illegally transmitting on regulated frequencies. Additionally, […]

The post GSM Traffic and Encryption: A5/1 Stream Cipher appeared first on Black Hills Information Security, Inc..

Ray Felch // Disclaimer: Be sure to use a faraday bag or cage before transmitting cellular data so you don’t accidentally break any laws by illegally transmitting on regulated frequencies. […]

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Raymond Felch // Preface: I began my exploration of reverse-engineering firmware a few weeks back (see “JTAG – Micro-Controller Debugging“), and although I made considerable progress finding and identifying the […]

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Raymond Felch // Being an embedded firmware engineer for most of my career, I quickly became fascinated when I learned about reverse engineering firmware using JTAG.   I decided to […]

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