The 2015 Bitstamp, 2015 Bitfinex, and 2017 Tether Hacks are Connected

Acknowledgements: I would not have been able to complete this as thoroughly as I did without building off existing work. It needs to be pointed out that years ago u/SpeedflyChris (archive) pointed out these same connections. I also relied heavily on a tool created by Aleš Janda.

In January of 2015 Bitstamp was hacked in what they described as a phishing attack. (Archive) These funds were withdrawn to 1L2JsXHPMYuAa9ugvHGLwkdstCPUDemNCf (referred to as 1L2 for the remainder of this piece for convenience) at first. Bitstamp also sent funds to 1AXsTbi4sSH1M5hccgdEVn5et9xFd7Bxpd (referred to 1AX) and 16KYFJiAoM4aX82xw2V3YBHX72trWNhz48 (referred to as 16KY). All 3 of these addresses which received withdrawals from Bitstamp were part of the same wallet and this can be determined by reviewing the transactions where they ‘co-spent’ or both provided inputs to a transaction, suggesting the same person could sign for both addresses. 1L2 and 1AX co-spent in transaction 7e80957db4514d150899b308b0472b51ce7b3dbd979f2b3e80681cb9067dac13 and 16KY and 1L2 co-spent in transaction 41afc875a478acdf322ea37e6edcd3878627e6d0b4a6c4de280708c822670b2a. This suggests the 2015 Bitstamp hacker was receiving funds from Bitstamp as late as December 19th 2018 in transaction 4a05c4347d5cf797f7eeacc1d1b6881ef9e4e71195025bb3275a18f495b988be. That is a LONG hack.

Continue reading “The 2015 Bitstamp, 2015 Bitfinex, and 2017 Tether Hacks are Connected”

Why I Unpublished My Book

For those who do not know, I use to run a nutrition and health website called Scientific Nutrition. While running this site, I came across intermittent fasting and in reviewing the literature, I thought it was a potentially useful behavioral trick for weight loss. However, I also found a variety of people making entirely nonsensical claims about intermittent fasting. They believed it cured cancer, diabetes, and overall was the solution to greater health. I wrote a book called The Optimized Guide to Intermittent Fasting that was meant to look at a healthy framework for using intermittent fasting for weight loss, combined with scientifically rooted myth busting surrounding claims others had made. I recently chose to unpublish this book and I would like to publicly discuss the reasons.

I always had a fear surrounding intermittent fasting that it looked a lot like disordered eating, but convinced myself that this is true for many diets, and allowed myself to go forward writing about it. However, as I have spent more time reviewing recent literature, and reflecting on my own eating patterns I felt compelled to remove it.

First, let’s address some of the recent literature that has been published and how that factored into my thought process. A recent five year prospective study on Bulimia Nervosa identified intermittent fasting as a strong risk factor for the development of bulimia. ( Furthermore, it suggested that intermittent fasting is a much better predictor of development than assignment to a weight loss diet. There is also generally a pattern in the pscyhology research that suggests that using any unhealthy or excessively strained eating pattern can correlate with later development of bulimia and binge eating disorder. This is consistent with my own experience.

I have for much of my life struggled with a nearly compulsive need to eat, and have often felt out of control while I am eating. Starting about a year and a half ago I shared this fact with my primary care provider, and have started receiving treatment for it. However, in the past it has been a problem that has repeatedly dogged me. It was always a source of great shame, and as such I was an expert in hiding my eating. If you occasionally grab some things out of the pantry, and eat less at the meals, then people might not notice. If you grab a Wendy’s Dave’s Double combo and eat it before you get home then no one has to know. If you eat this candy bar from the grocery store before you get back then no one will see it. These narratives had always been present in my head, and had influenced my relationship with my body, my weight, and my confidence.

There were periods where these feelings of shame surrounding my eating were nearly overwhelming. I remember several times in college where I would be kneeling over the toilet bowl, hoping I would be able to purge, because if I did then maybe I would not feel so wrong. I never did, and I am grateful for that fact, but in considering my own behaviors and the things I have written I have come to the conclusion that I can no longer endorse my own work.

The fundamental problem with intermittent fasting is that it represents the same thought pattern as certain types of disordered eating. Namely, that you can eat and consume and do all of that to your limit, so long as you follow this other procedure. It seems to serve much of the same purpose for many people as purging does.

Eating disorders are some of the mostly deadly mental illnesses, and lead to badly damaged health across a variety of measures, not to mention the difficulty inherent in living with them. As such, I have unpublished my book, will be removing any older podcast episodes discussing intermittent fasting, and adding a disclaimer to any older articles that will link back to this article. This may take me some time, so please be patient, but it is happening.

I am writing this article, because I have strongly publicly advocated for some of these techniques, and as such now that I no longer believe them I feel that you deserve to know that. I do still believe that intermittent fasting can be effective for some people, but I worry that the people advocating it for broadly or as a panacea may be unintentionally contributing to health problems, and I regret strongly that I did the same.

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Sunday Reads – Links I Found Interesting 6/16


PyTorch Hub is an awesome new step forward in research reproducibility for machine learning and artificial intelligence. Makes it super easy to publish your pre-trained research models and for others to download them and test them. I was shocked how uncommon it was for people to publish their models when I first started reading machine learning papers.

An enzymatic pathway in the human gut microbiome that converts A to universal O type blood

This was a metagenomic study that identified two enzymes that may help convert A and B blood to O increasing the supply of blood available.


This is a cool ArXiv access point with upvoting and down voting, ability to save notes, see twitter commentary on paper and more.

Scientific Nutrition Update 44: Arginine Precursors, Macrophages, and Recovery


This episode is a request from a fan of the site.  They wanted to know whether arginine precursors may help with recovery by interacting with macrophages.  This is a little bit heavier science than many of my episodes, but it was interesting to me and I hope it will be interesting to you too.

Continue reading “Scientific Nutrition Update 44: Arginine Precursors, Macrophages, and Recovery”