HNHacker News
TopNewBestAskShowJobs

kcanini

316 karma · joined November 26, 2013

submissionscomments
kcanini··on China Blocks WhatsApp
The Chinese people are harmed if any end-to-end encrypted communications services are blocked to ensure the government is able to spy on them.
kcanini··on How to hack a turned-off computer, or running unsigned code in Intel ME
Nice try, bot.
kcanini··on The Decline of Investment in San Francisco Startups
Seems like adding these stickers would be useful: http://thesource.metro.net/2013/02/13/new-platform-decals-re...
kcanini··on A hacker stole $31M of Ether – how it happened, and what it means for Ethereum
> if you don't make a major blunder like the Parity team

...Which was founded by the very person who developed the smart contract language Solidity. Which goes to show how difficult it is to write 100% bug-free smart contracts.

kcanini··on A hacker stole $31M of Ether – how it happened, and what it means for Ethereum
I think the point is that they bundle together the agreement with the actual execution of the agreement. The execution is performed by public code that everyone can audit and verify for themselves.
kcanini··on A hacker stole $31M of Ether – how it happened, and what it means for Ethereum
You just described how the adjudication of all contracts works. Smart contracts are no more above the law than paper contracts are.

> And the participants to such a contract have agreed that the execution of that software is the entirety of their transaction.

How would such an agreement be communicated or enforced? The same thing happens with paper contracts: when you sign on the dotted line, it's understood that the contract encompasses the entirety of your transaction. However, there always remains the possibility of appealing to the judicial system later to argue that the contract is void/unenforceable.

kcanini··on A hacker stole $31M of Ether – how it happened, and what it means for Ethereum
Considering that the US government has decreed that Bitcoin is an asset and capital gains taxes are due when they are sold/spent, I'm inclined to answer yes.
kcanini··on A hacker stole $31M of Ether – how it happened, and what it means for Ethereum
> Any contract that has all the outward aspects of being a smart contract but that allows a judge (or anybody else for that matter) to influence the outcome once it is activated is by definition a failed smart contract.

I think the crux of your argument with Marco is that he is viewing the "outcome" in a larger scope than you are. You seem to be focusing on the "outcome" as only the output of the smart contract, while the is viewing the "outcome" as the real-world consequences of the entire situation, as embedded in our political and legal systems.

kcanini··on A hacker stole $31M of Ether – how it happened, and what it means for Ethereum
I'm curious, how do you know what the average voter knew about the government in 1903?
kcanini··on 153k Ether Stolen in Parity Multi-Sig Attack
That pun is golden.
kcanini··on CoinDash’s ICO Website Has Been Hacked
I can think of at least two real-world uses where cryptocurrency is a better choice than fiat: (1) sending money overseas with very low transaction fee, and (2) transacting on the black market.
kcanini··on Blood from young animals can revitalise old ones
> documentary

I see what you did there :)

kcanini··on Snap falls to IPO price
> There's nothing dirty about it. Public investors prefer to have a single price, because that's, well, how public markets generally operate after an IPO.

In what sense is there a single price in public markets? There is a constantly-shifting order book full of many different prices, and the price of the last trade changes by the second.

If IPOs were conducted as a multi-item second-price auction, then everyone could indeed pay the same, fair price, more in line with what you described than the public post-IPO market.

kcanini··on The Matrix Cookbook (2012) [pdf]
This PDF literally got me through grad school. It's an amazing reference.
kcanini··on Truckers Working Alongside Coders Trying to Make Driverless Trucks
Let the arms race begin!
kcanini··on Comcast accused of cutting competitor’s wires to put it out of business
They probably mean "expensive for the customer", not "expensive for us".
kcanini··on Older fathers have 'geekier sons'
Yes, you're right. To guarantee causation, you need to either directly manipulate the variable, or control for every other variable in the universe (impossible). The more extraneous variables you control for, though, the more evidence you have for causation.
kcanini··on The most secure password
classic
kcanini··on The most secure password
The Mersenne Twister algorithm takes a random seed (which should be highly entropic) as input and then deterministically generates a series of outputs. It does not generate any entropy by itself, nor does it specify where your source of entropy should come from.
kcanini··on Bancor Is Flawed
> I could take other dollars and convert them to CAD at today's spot. I could wait six months and convert then. Either way I'm taking on currency risk.

I see how the second case (waiting six months to convert USD to CAD) involves currency risk. But I don't understand how the first case involves currency risk. If I converted some USD into 1.3MM CAD today, and then held it for six months before paying my vendor, what currency risk did I incur that is eliminated by the futures contract?

kcanini··on Bancor Is Flawed
I guess I'm assuming you can always borrow USD if you want to make this type of trade on the spot market without actually owning USD in the first place, or if you want leverage.
kcanini··on Bancor Is Flawed
Example: 1 USD is currently worth 0.79 GBP. If I wanted to bet that the USD would decrease in value against the GBP, I could enter into a futures contract (assuming the existence of a wiling counterparty) to purchase 0.75 GBP for 1 USD at a date 3 months in the future. If I was right, and the exchange rate drops to 1 USD = 0.7 GBP, then I profit 0.75 - 0.7 = 0.05 GBP.

Instead, I could have just bought the 0.79 GBP immediately and then waited 3 months, and then I would have profited even more: 0.79 - 0.7 = 0.09 GBP.

What does the existence of the futures market allow me to do that I can't already do in this scenario?

My point was that in cases where production is cyclical or storage fees are nonzero, it might be difficult/impossible to trade on the spot market, or it might be prohibitively expensive to hold the item yourself. But currencies don't have either of these problems.

kcanini··on Bancor Is Flawed
Possibly dumb question: What is the point of a futures market for a currency?

I understand why futures markets exist for e.g. oranges (seasonal production cycles) and jet fuel (to avoid storing a years' worth yourself). But currencies are available 24/7/365 and have zero storage cost.

kcanini··on Casper, Mattress Maker, Raises $170M and Plans I.P.O
They must have meant "couple hundred percent".
kcanini··on The Mosteller Hall Puzzle
I think a correct analysis of this problem requires you to know the guard's exact policy for what to say in every possible situation. The author has assumed that in the case that A is pardoned, the guard randomly chooses whether to answer "B" or "C" with equal probability, but we have no evidence for this.

Consider, for example, how you would analyze the situation where the guard says to A, completely unsolicited, "Hey, just so you know, B is still condemned to die."

On the one hand, it seems that the author's exact same analysis could be used in this situation: the guard's policy here might be exactly the same as it was in the original situation (where A asks the guard to name one of the other prisoners). On the other hand, perhaps the guard's policy was to only offer this information to A if A were pardoned. Or maybe the guard would have only said this if C were pardoned. We just don't know, so we can't calculate the probability that A is pardoned.

kcanini··on Does the Inertia of a Body Depend upon its Energy-Content? (1905) [pdf]
The last page says, "This edition of Einstein’s 'Does the Inertia of a Body Depend upon its Energy-Content' is based on the English translation of his original 1905 German language paper."
kcanini··on “1M Syrian customers, do you think they will ever forget Western Union?”
Where is "here"?
kcanini··on “1M Syrian customers, do you think they will ever forget Western Union?”
If they don't have internet, how does Western Union receive the message for the money transfer?
kcanini··on C.S. Lewis's Greatest Fiction: Telling Kids They’d Like Turkish Delight (2015)
The rose-flavored ones are my favorite!
kcanini··on Bitcoin is tumbling – Off almost 40% from its high
It's ridiculous... if it had dropped from $3,000 to $1,000, would that be called a 200% drop?!
← PreviousPage 2 of 4Next →