Back to reality after another amazing DEFCON!

I met a pile of incredible people.  Bought some amazing toys (for science), some i’ve even got working.  Saw some talks and demos.  Talked to some of my heroes and listened to even more.  I saw Ladar Levison talk about epoxying your ports and adding thermite to your hard drives.  I played with the ECU of a fake car!  now i just have finish building the DarkNet Badge!  enjoy my pictures. The hat data is still being analyzed.  I’ll try to build something out of it eventually.


DEFCON26 - Badge Acquired DEFCON26 - Car Hacking Village Badge DEFCON26 - Blockchain Badge DEFCON26 - Show us what you got?! Battlefield Las Vegas - Mac-10 Battlefield Las Vegas - Tank Collection Battlefield Las Vegas - Tank crushing car Battlefield Las Vegas - Tank crushing car close
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Introducing DEFCam or how i made a hat for DEFCON!

DEFCam hat

This is a silly project that i have spent probably too much time on.  First I thought, why not time-lapse my upcoming defcon trip.  Then i thought, why not live stream it.  So… I started with a Pi Zero and a Pi Camera v1.  Wired some pins to the GPIO for power.  Made a custom wire and hot glued it into the hat.  Done!

https://be3n.com/defcon

DEFCam - pi zero cam case

DEFCam - prototypeDEFCam - original wiringDEFCam - can see itself
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My Defcon 26 Short Story Contest Entry Part 1! Finally!

Defcon Short story contest entry by be3n

Chapter 1 : Knowledge Distribution and Collection

In a large lecture hall only moderately filled, Yohan stood before a class of first year computer science students.  The dark rings under his brown eyes and matted light brown hair highlighted his rumpled and unkempt appearance. He was of average height with broad shoulders and a bit of a barrel chest.  Barely older than his students, he hardly had their attention as he began to speak.

“Infinite monkeys pounding on keyboards will eventually produce Shakespeare!  We’ve all heard this. Is that machine learning? Are these nearly infinite transistors your army of monkeys?”, he asks.  A few students timidly raised hands before he answered himself, “No, we are not leveraging the power of infinite monkeys here.  Here we teach learning systems not just how to learn, but how to teach themselves to learn even better,” he continued. The students started to raise eyes from their glowing screens to follow Yohan as he slowly drew their attention.

Speaking enthusiastically, his eyes began to brighten, “Your model is derived by the learning systems analysis of the data you feed it. Bad data creates bad learning. One famous example from the early days of machine learning was an Army effort to train a system to detect tanks from aerial reconnaissance.  The scientists working on the project did not notice at the time that all the photographs taken containing tanks in the sample were taken on overcast days. Most of the photos that did not contain tanks, had been taken on sunny days. In the end, they did not train the model to detect tanks, but instead to detect cloudy weather.  If you are not careful this can happen to you.

“False assumptions lead to false predictions and the model degrades.  It is increasingly important to properly select the data points for your matrix as well as allowing for the training of weights and biases assigned to these data points.

“Just like our tank example, we can find other false assumptions.  The racist biases that lead to the idea that immigrants bring crime can also be attributed to a bad learning data set.  In our immigrant example, that learning data set could be the content produced by Fox News. Bias is not always bad, we need them to judge the significance of our data.  For another example, say you wanted to go out to eat. In order to select a location, you might ask a friend, Paul for his favorite restaurant. He suggests a Bowling alley diner.  Does this choice reflect bias? Might it help to know going in that Paul’s favorite food is hot dogs and bowls every weekend as part of a league? Should it affect the significance you mentally apply to his suggestion?  These are the weights and biases that we apply in our everyday decision making. These same sort of weights and biases must be trained into the learning model. And they are, every time. It is usually not possible to eliminate input bias entirely..” Many in the class seemed a bit perplexed by all this new information.

“Rule of acquisition #74 states that knowledge equals profit.  In our case knowledge equals model. The more training you can supply, the more points in your matrix, the greater and more accurate the predictability.  How many of you have worked with confusion matrices?” Someone called out, “They’re all confusion matrices to me,” but Yohan didn’t reply, he just waited patiently. . In time nearly all the students raised their hands. .  That was a good sign. He continued his lecture going over some examples of using bias of various data to increase the flexibility of the model. . . By the time he was talking about practical uses for stochastic gradiants, most of his students’ attention had wandered. Continue reading “My Defcon 26 Short Story Contest Entry Part 1! Finally!”

Last minute writing contest entry received!

Defcon short story submission received!

It came down to the wire, but I got my story submitted.  Well, half of it anyway.  yea, i ended my story with the classic “To Be Continued”  Now i need to set to work on the conclusion.

Thanks to Sora, Paul, and my wife for not killing me while I got crazier and crazier over this project.

I will post both Part 1 and Part 2 here at some point.  Official Entries can be found here.  I want to  finish one more pass of edits first.  But get to reading, only 1 week to vote!

Defcon 2016 photos and videos

Close ups of my much coveted badge.  Some hardware and base stations of the wifi village.  Both Information Society and Berlin played on Saturday night!  Shot a video of an amazing demo from the Car Hacking Village.  A car modified to play games instead of driving.  Also, the best of my flight home.  Some great pictures of Hoover dam and some of the solar farms and mesas as we few home.

defcon 2016 badge closedefcon 2016 badge chipdefcon 2016 wifi villagedefcon 2016 wifi village 2 
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Throwback Thursday – be3n’s boyhood home!

be3n boyhood room 4upI found more pictures of my old bedroom recently.  Below, I cleared out my bed to install a pull out sofa (seen in next frame).  It turned my high school room into quite the hangout.  Also on display were some art and other decorations from that era.  If you look closely, you can find Pez, impressionists paintings, comics, Magic packs, and a Sun optical mouse/mousepad.  I wonder what others will find.  My room’s walls were quite the collage.  I’ve added more pictures including this 4up from my Nickelodeon Photo Blaster.  Can you find Audio/Video tapes next to the original Nintendo?  enjoy.

be3n boyhood roombe3n boyhood bedroom packing for Defcon
In that last picture, my room is trashed while i pack for the Defcon Hacker conference in Las Vegas.