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481  Economy / Speculation / Re: Should I Trade My Silver For Bitcoins? on: November 17, 2013, 09:22:07 AM
I have sold all my gold and silver, bought bitcoins, tripled my money already.

I am close to sixty now, but I can see the writing on the wall. PM is dead, especially silver & gold. If you want to hedge with PM, I would choose something with heavy industrial use.
482  Economy / Economics / Re: Transactions Withholding Attack on: November 17, 2013, 09:17:24 AM
If I understand this right by 2033, the miner reward will drop to 0.78125 btc. If Bitcoin is as big of a success as the core believers expect, this may be in the neighborhood of a million dollars. I could imagine a lot of small timers taking a loss on mining just hoping to hit the jackpot. Even if Amazon holds transactions till they win a block reward, I think there will still be enough competition. Besides, if the world is headed towards decentralization, Amazon might be lucky to have 5% of the world ecommerce business.


483  Bitcoin / Bitcoin Discussion / Re: Does the general public know they can buy fractions of Bitcoin? on: November 17, 2013, 08:18:55 AM
It is just a matter of education. Knowledge will spread. People will learn. Just be patient. Cheesy
484  Bitcoin / Bitcoin Discussion / Re: Does the general public know they can buy fractions of Bitcoin? on: November 17, 2013, 07:42:56 AM
Buy your Bitcoin wallet for only $9.95 and get a million satoshis for free!
485  Other / Politics & Society / Re: People who do not believe in Jesus Christ are blind and deaf on: November 15, 2013, 03:36:16 AM
Shouldn't this thread have been started in off-topics? Or is it just me that fails to see the connection to Bitcoin?
486  Bitcoin / Bitcoin Discussion / Re: Using Bitcoin to fight crime on: November 15, 2013, 03:00:20 AM
+1 Very clever.

And fighting crime aside, remember that without financial privacy, you're giving every single person you pay information that invites crime, such as how many Bitcoins they can take from you by force.

Yea, I should probably change my signature too!
487  Bitcoin / Bitcoin Discussion / Re: Time to Boycott all US Companies on: November 14, 2013, 10:27:39 PM
Many decades ago, Krugerands became tainted. They sold at below the gold spot price. Then one day, everyone woke up and realized that they were still made of gold. Now they are worth their weight in gold again. I suspect the same thing will happen with tainted coins. Hakuna matata, no worries here.
488  Bitcoin / Bitcoin Discussion / Re: Coin Validation misunderstands fungibility and could destroy bitcoin on: November 14, 2013, 09:43:22 PM
Reusing an address allows for a possible security breach in the ECDSA algorithm. Many random number generators are not truly random. If the same number is used twice while sending money from an address, then the private key can be calculated as per this paragraph from the wikipedia article on ECDSA:

Quote
When computing s, the string z resulting from \textrm{HASH}(m) shall be converted to an integer. Note that z can be greater than n but not longer.

As the standard notes, it is crucial to select different k for different signatures, otherwise the equation in step 6 can be solved for d_A, the private key: Given two signatures (r,s) and (r,s'), employing the same unknown k for different known messages m and m', an attacker can calculate z and z', and since s-s' = k^{-1}(z-z') (all operations in this paragraph are done modulo n) the attacker can find k = \frac{z-z'}{s-s'}. Since s = k^{-1}(z + r d_A), the attacker can now calculate the private key d_A = \frac{s k - z}{r}. This implementation failure was used, for example, to extract the signing key used in the PlayStation 3 gaming console.

The odds of using the same random number from a faulty RNG goes up as y=x!/2 (as long as x>1, otherwise y=0), where x is the number of transactions sent from the address. I feel safe reusing an address after swiping it once, even though it is only protected by the strength of irreversibility of the ECDSA algorithm. However, I will not reuse an address after pulling funds out of it a second time.

For people who trust their RNG algorithm, this may seem to be mute issue. But I am sure that people using the SecureRandom() call in Java on their Android phones felt pretty safe. As we all know, they weren't.
489  Economy / Speculation / Re: Guesses on when we'll break $10 on: November 13, 2013, 07:40:46 AM
hmm, guessing $10 per mbtc in September 2015 according to the logarithmic regression chart line.
490  Bitcoin / Bitcoin Discussion / Re: How To Sell BTC With a Paper Wallet on: November 13, 2013, 03:30:04 AM
What is the safest place to import the private key to?

I trust blockchain.info
491  Other / Politics & Society / Re: Bitcoin is unregulated and there are no state laws for bitcoin on: November 13, 2013, 03:20:21 AM
Bitcoin is regulated by the laws of mathematics.
492  Economy / Service Discussion / Re: Coinbase honored my contract. on: November 13, 2013, 01:32:00 AM
I just received an email from Coinbase.

1) They have whitelisted me.

2) They are honoring our original contract of 9.25 btc for $1,945.07

At this point I am fully satisfied with their service and I will lock this thread.

I wish to thank Olaf for his personal care in this matter.

Pente
493  Economy / Service Discussion / Re: Warning! Do not use Coinbase.com Scam Artists! on: November 13, 2013, 01:20:46 AM
I want to thank Olaf for resolving my order of 9.25 Btc. for the original price.

I also want to thank you for whitelisting my account. This will also make it possible for me to start selling bitcoins on the Big Island of Hawaii to other people interested in bitcoin as I now have a quick and easy way to refill my wallet.

Thank you Coinbase.

Cheesy
494  Economy / Service Discussion / Re: Warning! Do not use Coinbase.com Scam Artists! on: November 12, 2013, 06:09:16 AM
they need to work on support for sure. Just be patient the few problems I had with them were annoying but all solved to my content. Try pming Olaf on this forum to expedite it

PMd him last friday, no response yet.
495  Economy / Service Discussion / Re: Coinbase Transaction Times? on: November 11, 2013, 02:35:17 AM
1. Does anybody know how long it takes to withdraw to a US bank from Coinbase? 

2.  How long does it take for Buy and Sell orders to register?  Is it immediate?

Buy/Sell orders typically take 7 days to complete.

Warning though: If you buy, and the price goes up in that 7 days, there is a high probability that they will cancel your transaction.
496  Economy / Service Discussion / Re: WARNING: Coinbase Possibly Going Scam (READ First) on: November 11, 2013, 02:28:31 AM
Nothing at Coinbase would surprise me anymore.
497  Economy / Speculation / Re: Warning, Sell your bitcoins ASAP before we break the $5.00 wall on: November 09, 2013, 06:51:43 PM
Thought he was talking about mBTC....then I saw the date  Shocked

Just realized if it was mBTC, I was off by a factor of 10, lol.
498  Bitcoin / Bitcoin Discussion / Re: Is Bitcoin entering the mainstream FINALLY? on: November 09, 2013, 06:39:24 PM
To really become mainstream, I think we will need a portable hardware wallet that is basically foolproof and trustworthy. We have the technology, it is just a matter of a major manufacturer putting one together.
499  Economy / Exchanges / Re: Bitstamp security hull breach? on: November 09, 2013, 07:34:46 AM
Once upon a time, when I was young, I use to be a programmer. My instincts say that this is a programming glitch at Bitstamp caused by the withdrawal, cancellation, then final withdrawal.
500  Economy / Service Discussion / Re: Coinbase just scammed me for over $1000 on: November 09, 2013, 06:50:01 AM
Quote
No, they didn't take his money.  They probably didn't even take the money out of his bank account.

I hate to say it, but this guy IS high risk.  Adding and deleting bank accounts, making large purchases right after small one's...


@danieldaniel, you are correct in saying that the original $1,945.07 is still in my bank account. Regardless, the money was still tied up for a week. I could not use it to make a purchase elsewhere. Coinbase was able to capitalize on that fact to make gains on the bitcoins that they purchased for me and held during that week.

I never said anything about deleting bank accounts and have never deleted a bank account with Coinbase. That being said, Coinbase has deleted my first account three times. Each time it was deleted after I attempted to make a buy. The fact that you know this (when I didn't mention it) makes me strongly suspect that  you work for Coinbase. Do you?

Testing Coinbase with small purchases (0.25 btc) makes perfect sense if you know that there are problems with making a purchase. There is no reason to tie up large amounts of money until the software glitches involving a bank transferring money to Coinbase are solved. This is not behavior that indicates fraud, it is the behavior of a person dealing with a dysfunctional system.

Quote
Every business in the real world has fraud management.  I don't see why Coinbase shouldn't.

This is really the meat of the issue. There is a right way and a wrong way to manage fraud.

The wrong way is to put all the losses on the customer while Coinbase gets to capitalize on the gains. Breaking a contract 7 days after a purchase is made is dishonorable.

The right way would be to either: (a) hold the bitcoins bought till the danger of fraud has passed  (b) lower the amount of the possible transaction to the level of trust in the customer (c) transfer the funds to Coinbase, then allow the customer to make a purchase after the funds are secure.

Coinbase should honor my original contract of 9.25 btc for $1,945.07

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