Great Scott Gadgets

open source hardware for innovative people

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Wassenaar Comments


Today I submitted the following comment on the Bureau of Industry and Security (BIS) Proposed Rule: Wassenaar Arrangement Plenary Agreements Implementation; Intrusion and Surveillance Items.

Thank you for inviting comments on the Wassenaar Arrangement Plenary Agreements Implementation for Intrusion and Surveillance Items. As a member of the information security community, I am concerned about the effects of the proposed implementation on my industry.

I'll keep this brief by voicing support for the comments made by other prominent members of the community: Google, Katie Moussouris, Robert Graham, and Sergey Bratus et al.

My greatest concern is clarity of the proposed rule. If you must provide an answer to a frequently asked question about what a rule means, it may be because the rule was not written clearly. I was particularly troubled by the publication of the FAQ regarding the proposed rule, partly because it indicated a lack of clarity in the rule but also because the answers didn't seem much clearer. Had the answers been clear, I would still be concerned that the text of the rule would not be interpreted in the future in the same manner as your present interpretation. The text matters, and it is overbroad and unclear even to well informed members of the information security community.

Unfortunately, computer security is an unsolved problem. The people who are working to improve the state of the art of computer security are diverse members of a global community of researchers. The proposed rule directly prevents the sharing of information among those researchers, and it will have a negative impact on the security of computing systems and software for the entire world.

Software is a form of information, and control of the flow of information is very different from control of the transport of physical goods. I urge you to remove software from the scope of the Wassenaar Arrangement at the annual meeting of Wassenaar Arrangement members in December 2015.

Black Hat Student Pass


If you are a full-time university student and would like a free ticket to this summer's Black Hat Briefings, send an email to freestuff@greatscottgadgets.com today. We have two tickets to give away, and we would like to give them to students who share our interests. You must meet Black Hat's criteria, and you will be responsible for your own travel and lodging.

We'll be busy at Black Hat USA this year. I'm teaching two sessions of my Software Defined Radio class, and I will be giving a talk at the Briefings about the NSA Playset. Additionally, Taylor and I will show off a new project called YARD Stick One at the Black Hat Arsenal.

HackRF One at 1 MHz


We've decided to advertise the fact that HackRF One operates all the way down to 1 MHz, not just to 10 MHz. This isn't a change to the hardware design; it is simply an acknowledgment that the hardware has always worked at such low frequencies and that we support operation down to 1 MHz.

transmit power plot

In fact, HackRF One can even function below 1 MHz, but the performance drops considerably as the frequency decreases. The curve is reasonably flat down to about 1 MHz, so we consider that to be the lower limit for most uses.

Now that we've seen consistent low frequency performance across multiple manufacturing runs, we're comfortable changing the official specification: HackRF One operates from 1 MHz to 6 GHz. Try attaching a long wire antenna to listen to shortwave radio!

Although HackRF One has reasonable performance down to 1 MHz, it performs better at higher frequencies. To get the best possible performance down to 1 MHz and lower, I recommend using an external upconverter/downconverter such as the excellent Ham It Up, open source hardware designed by Opendous.

Open House Invitation


For the first time ever, Dominic, Taylor, and I will all be in the same place at the same time in June. We decided we should celebrate, and you are invited!

Please join us at our recently expanded lab in Evergreen, Colorado on 11 June 2015 from 17:00 to 19:00. You can see the lab, talk to us about our projects, check out our latest prototypes, and even learn to solder!

RSVP to info@greatscottgadgets.com by 4 June 2015 so we don't run out of refreshments.

Great Scott Gadgets
27902 Meadow Drive, Suite 150
Evergreen, Colorado 80439
(the Canyon Courier building)

Free Stuff, February 2015


Great Scott Gadgets is pleased to announce the recipients of our inaugural Free Stuff give-away. This being our first give-away, we got a little overexcited and ended up giving away 5 HackRF One units to people who made requests in February! We were excited to see so much interest in our Free Stuff program, and after much deliberation we were able to narrow the field down to these 5 entrants. Congratulations, and we can't wait to see what you do with your HackRF Ones!

Alex Page wrote to us representing the Interlock hackerspace in Rochester, New York, which has recently begun hosting SDR meetups. They have been encouraging those new to SDR as well as seasoned veterans, and they have made a space where they can all interact. We are awarding Interlock a HackRF One unit to encourage this sharing of knowledge. Thanks Alex, and keep up the good work.

JinGen Lim is a promising student and developer from Singapore. When HackRF One was released he used it as an inspiration to build his own open source device called CCManager. We awarded JinGen a HackRF One unit to see what he can come up with next. Thanks for making your ideas open source JinGen!

Rajesh Kannan is a licensed amateur radio operator and enthusiast as well as a rather successful amateur meteorologist. Rajesh has plans to use his HackRF One to help develop an HRPT satellite receiver with a group of students in India. Thanks Rajesh for igniting the RF spark in the next generation!

Taavi Laadung is a graduate student at the Tallinn University of Technology in Estonia. He is working on a nanosatellite project and plans to use the HackRF One that we give him to help build a ground station. Thanks Taavi for including the HackRF One in your research.

Chris Johns is a student at Spokane Community College in Spokane, Washington, and with the help of a few other members of their technology club Chris plans to use his HackRF One to start an amateur digital TV station. It's an interesting proposition, and we thank you for trying it out, Chris. Good luck!

Thanks to everyone that sent us a request. If you didn’t send us a request, why not? It never hurts to ask. We look forward to seeing what you come up with next!

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