Devices: Arduino, Mullvad, and Tillitis
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This DIY strain wave gearbox is strong enough to pull a car | Arduino Blog
Mechanical advantage is arguably the most important engineering concept that humanity has ever learned to harness. By converting distance, like the length of a lever or rotations of a gear, into torque (and vice versa) we can overcome almost any physical challenge. But that distance can be an issue. For example, if you have an input gear 10mm in diameter and want a 100:1 reduction, your output gear needs to be a full meter in diameter. Strain wave gearboxes solve that problem and Brian Brocken’s video will walk you through how to build your own that is strong enough to pull a car.
To avoid meter-wide gears, engineers typically turn to gearboxes that incorporate several gears. Each gear multiplies the reduction of the preceding gear, so several gears can achieve dramatic reductions and one can arrange them in a compact space. But a strain wave, AKA “harmonic drive,” gear can achieve a similar reduction with just three parts: a wave generator, a flex spline, and a circular spline.
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Rep. Jackie Walorski's driver was at fault in the fatal crash, police say
The sheriff's office said evidence from the crash reconstruction, including information from the airbag control module (also referred to as the car's "black box") showed that the Toyota was traveling at 82 mph five seconds before the crash.
Police added no phones were apparently used prior to the crash, and there was no indication of mechanical failures.
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Mullvad creates a hardware company
Something that makes the key unique is the fact that both its software and hardware are open source. Therefore it can be trusted because of its ability to be inspected and verified. The USB is free to be programmed by end users whilst still being secure. This offers the flexibility to easily be used in a wide variety of new applications.
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Mullvad Creates an Open-Source USB Security Key
According to Mullvad, this process should allow the Tillitis Key to verify an app’s integrity before it loads. It also prevents applications from “seeing” each others’ secrets, which may provide a strong defense against malware. (Note that Tillitis Key loads applications, but these applications aren’t persistently stored on the security key.)
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Tillitis Key
A user- or host-supplied secret can also be mixed into the key derivation function, providing further protection. A sophisticated physical attacker should be assumed to have knowledge of the target application’s hash, and will likely eventually succeed in extracting the UDS from the hardware. By adding a host-supplied secret, knowledge of the application used as well as the security key’s UDS is not sufficient to produce the application secret. This makes the security impact of a lost or stolen Tillitis Key less than for conventional security keys.