J. B. Crawford

Why radio receivers won’t tune 800-900 MHz

RuBee

I have at least a few readers for which the sound of a man's voice saying "government cell phone detected" will elicit a palpable reaction. In Department of Energy facilities across the country, incidences of employees accidentally carrying phones into secure areas are reduced through a sort of automated nagging. A…

USB On-The-Go

USB, the Universal Serial Bus, was first released in 1996. It did not achieve widespread adoption until some years later; for most of the '90s RS-232-ish serial and its awkward sibling the parallel port were the norm for external peripheral. It's sort of surprising that USB didn't take off faster, considering the…

GRC SpinRite

I feel like I used to spend an inordinate amount of time dealing with suspect hard drives. I mean, like, back in high school. These days I almost never do, or on the occasion that I have storage trouble, it's a drive that has completely stopped responding at all and there's little to do besides replacing it. One time…

Passive Microwave Repeaters

One of the most significant single advancements in telecommunications technology was the development of microwave radio. Essentially an evolution of radar, the middle of the Second World War saw the first practical microwave telephone system. By the time Japan surrendered, AT&T had largely abandoned their plan to…

The keyboard controller

One of the more common arguments you hear in contemporary computer security circles is about hardware trust and embedded controllers. Technologies like Intel ME, the ARM Secure Element, TPMs, etc, remind us that the architecture of the modern computer is complex and not entirely under our control. A typical modern…

The Parallel Port

A few days ago, on a certain orange website, I came across an article about an improvised parallel printer capture device . This contains the line: