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Peter Todd @peterktodd
, 8 tweets, 3 min read Read on Twitter
Message I got from Zooko re: their efforts to recover the missing Zcash trusted setup ceremony transcript.

Given there is a chance at a market moving hundreds of millions of dollars screw up, I don't want to be in possession of any insider info. So I'm making this transparent.
I'm disappointed that they have chosen to delay investigating this for months in an effort to release Sapling first rather than just being upfront about it.

github.com/zcash/mpc/issu…
Something a friend just sent me seconds ago: "Thanks for telling me early so I could move all my coins"

They're joking of course, but quite seriously this kind of insider trading thing is exactly why I don't want to be in possession of any insider info on this.r
Right now I only own trivial amounts of Zcash (iirc about $100 worth).
@zooko I'm going to reply here because this isn't a security issue in the normal sense. We're not fixing a vulnerability here, we're fixing an embarrassing lack of record keeping that only shows potential incompetence or fraud.
@zooko Anyway, you guys even hired a journalist to go through that hard drive of materials I sent you, so I can't see how you've forgotten about this. Rather this seems to me like shifting blame.

Secondly how did you guys lose those files? Who else are you recovering stuff from?
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There's been some claims made recently that a compromise of the Zcash trusted setup can't compromise privacy.

I checked with one of the cryptographers working on zk-SNARKs, and these claims are false.

A compromised MPC absolutely can wreck privacy; Zooko needs to correct this.
The problem is that the final public parameters can be constructed in such a way that they do not protect privacy. Doing this correctly is the responsibility of the MPC coordinator; the Zcash daemon is unable to verify that the parameters are correctly constructed.
I raised this issue months ago and nothing was done. In fact, as of writing it's not possible to verify the MPC correctly generated public parameters as the necessary files are missing; a GitHub issue for this problem has been open for six months: github.com/zcash/mpc/issu…
Read 5 tweets
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I hate dealing with infosec Twitter sometimes... I criticised calling Doom on a Bitfi that had been physically dismantled w/ circuit probes "hacking" - while carefully noting Bitfi did have issues.

What happens? Apparently one of them contacted a client of mine to bad mouth me.
Why is opening a device and playing Doom on it just a dumb stunt?

If you can open a device w/o the user noticing, you can also replace the hardware. And in particular, you can add a MITM *inside the device itself* between any secure element and the UI.
MITM the UI/UX and the security chip can't help you much: you might think you're authorizing a $10 payment to Alice, but the chip thinks you're trying to send $10,000 to Mallory.

Defeating this kind of attack requires tamper protection of *all* the hardware, not just one chip.
Read 11 tweets
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Some thoughts on proofs-of-time, as I've been spending a bunch of time looking at ASIC design lately...

0) As we know, if I have a significantly faster proof-of-time than others, I have a potential advantage.
1) A proof-of-time is essentially restricted by the latency from input to output. At the low level, that latency can be measured by the maximum number of logic gates - the critical path. Often adding more gates can *decrease* that latency (e.g. carry-lookahead adders).
2) It may also be possible to decrease that latency by making circuits unreliable; to combat the unreliability, you'd add parallelism until at least one attempt worked.
Read 23 tweets

Related threads

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1) This is my Q thread for January 5, 2019

Q posts can be found here:
qmap.pub
qanon.pub

Android apps:
bit.ly/Q_Drops
bit.ly/Q-alerts

My theme: Follow the Watch
2) I didn't post the previous drops from Q on December 22nd. (There were only two).

Here's the first one from that day.
3) The link is to a video where Bill Clinton and Barack Obama told the world how serious they were out immigration reform.

It's easy to say you're tough on illegal immigration when you know Congress won't vote for immigration reform or border security.
Read 173 tweets
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Some people have shown interest once again in Benghazi, to me this tragedy is still very important. I'm not talking about Susan Rice hitting the Sunday Morning circuit lying about the attack, however it is important but all the things leading up to Benghazi, & why they were there
On July 25, 2012 Taliban fighters in Kunar province Afghanistan successfully targeted a US Army CH-47 helicopter with a new generation Stinger missile. The terrorists didn't properly arm the missile, so it didn't explode, it only downed the chopper. #Benghazi
The next day, an EOD team arrived to pick through the wreckage and found unexploded pieces of a missile casing that could only belong to a new generation Stinger missile. Lodged in the right nacelle, they found one fragment that contained an entire serial number.
Read 132 tweets
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💰Elliott Broidy💰

📌Let’s turn our attention to Elliott Broidy, a key player in TeamTrump scandals.

📌His is a tale of government influence, foreign machinations, piles of money, and even a Playboy model mistress.
washingtonpost.com/blogs/plum-lin…
📌After Trump won the election, Broidy & Michael Cohen were named deputy finance chairmen of the Republican National Committee, and quietly began making deals.

📌Cohen signed up corporations including Novartis and AT&T.

📌#GOPComplicit #Pay2Play
apnews.com/7899619719114e…
📌Broidy & Cohen signed up the government of Ukraine and an investment fund linked to a sanctioned Russian billionaire, to provide access and “insight” about the Trump administration.

📌#Pay2Play
qz.com/1287027/a-time…
Read 64 tweets
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Analysis | 5 big takeaways from the new Michael Cohen and Paul Manafort filings
#SaturdayMorning #MuellerFriday #CohenSentencingMemo #ManafortMemo washingtonpost.com/politics/2018/…
2-"Federal prosecutors drew some more important lines between Russia and those connected to President Trump on Friday, in a trio of filings in the Michael Cohen and Paul Manafort cases.Beginning late Friday afternoon, we saw Cohen sentencing recommendations filed by both the
3-"Southern District of New York and special counsel Robert S. Mueller III’s Russia investigation, and a document from Mueller’s team laying out Paul Manafort’s alleged lies to it. In all three, the plot thickened for Trump just a little bit. Below are the big takeaways.
Read 30 tweets
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Bill Browder is from Chicago. I wonder if he knew Obama?
William Browder, an American-born oligarch who renounced his U.S. citizenship to become British, apparently for tax purposes. The US taxes off-shore real estate. The UK doesn't.
Browder got rich in Moscow running a hedge fund and was friendly towards Vladimir Putin’s government until he stole $230mill from the Russian people in a trans-Atlantic offshore accounts and tax evasion scheme when he owned ran the largest foreign investment fund in Russia.
Read 22 tweets
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‼️Mapping Erik Prince’s Private Mercenary Empire

📌Prince is the modern architect of private military firms

📌His latest venture is in training security personnel in China

📌But he's been all over the world, outsourcing militaries to cheap labor markets
albawaba.com/news/mapping-e…
Erik Prince, the brain behind the infamous private military firm Blackwater, is now in China training security forces.
#ErikPrince #China
albawaba.com/news/mapping-e…
Prince, a former Navy SEAL, helped found Blackwater in 1997. The company rose to prominence after the Sept. 11 terrorist attacks and the U.S. invasions of Afghanistan and Iraq.
npr.org/2017/08/31/547…
Read 117 tweets

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