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201
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Economy / Economics / Re: Investment companies and bitcoins
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on: September 23, 2013, 09:02:04 PM
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Buying coins by yourself is the best investment options since you don't need to rely on a third party to handle the coins for you, thus no risk of default
I do own a couple of coins myself. I was asking to know if there was any movement in this direction since it could have huge implications for the coming price moves in bitcoins as well as its respectability. |
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202
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Economy / Speculation / Re: Wall Observer - MtGoxUSD wall movement tracker - Hardcore
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on: September 23, 2013, 08:59:58 PM
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I am beginning to think that Bitcoin is a project by U.S. intelligence agencies to cognitively infiltrate Austrian economic enthusiasts by way of educating them about how things got to be the way they are.
What lessons are being learned exactly? Well, for one, that quantitative metrics matter. It is not sufficient to make a projection to extremes based on the limited understanding of a theory. This is important for understanding little things like when you can apply linear relationships and when you have to apply exponential relationships... Little things like that. For another. Market systems are more complex than you might expect if the only model you have for them is a cartoon. It is insufficient to simply dismiss things you don't agree with as 'externalities'. One thing we have learned very well about risk management is that externalities and complexities matter. Isn't it a bit judgemental to think that all members in here subscribe to just one economic theory? I wrote this a long time a go and I also had my fight with the pure Austrians: https://bitcointalk.org/index.php?topic=160227.0 |
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203
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Economy / Speculation / Re: Wall Observer - MtGoxUSD wall movement tracker - Hardcore
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on: September 23, 2013, 08:56:17 PM
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Not much going on in here so I might as well throw this question out:
If you want to buy for a large amount, say between $ 50k and $ 200k, what is usually the be way to buy them on the exchanges?
By announcing on a public forum when you're going to buy and at what price you're prepared to buy. Posts on this thread such as, "Wow, get ready for the big one," will suffice just fine though. I can't see what all the fuss is about. I trade bitcoins for my customers but I do not currently need to buy this kind of amount. I might in the future, though. Might as well arm myself with some knowledge. |
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204
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Economy / Speculation / Re: Wall Observer - MtGoxUSD wall movement tracker - Hardcore
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on: September 23, 2013, 01:41:39 PM
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Not much going on in here so I might as well throw this question out:
If you want to buy for a large amount, say between $ 50k and $ 200k, what is usually the be way to buy them on the exchanges? I guess somekind of limit order would be preferable?
I have moderate experience in buying such quantity from an exchange. It is difficult to give good advice, because it depends a lot on the exchange, the general mood, and the players in the exchange. If there are big sellers watching, it may be good to set up a wall near the market, this will induce them to sell without slippage for both. This approach may, however, be detrimental in boom days, where a big bid wall just prompts other bidders higher. If you dare to bring scarecoins to the particular exchange, it is possible to pretend to be on the sell side with big walls, while actually purchasing nimbly. Even more aggressive tactic is to batter the price down with a supposed flood of coins (very few of which are actually for sale though) and purchase 5-10% cheaper. Before doing anything creative it is important to familiarize yourself with the exchange in question, plus the market situation. Sirius Money looks good. +1  Thank you! Good to see you back online. How is Hopea doing? |
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205
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Economy / Economics / Investment companies and bitcoins
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on: September 23, 2013, 01:13:51 PM
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We have all heard about the Winklevoss' plans to start an ETF but do you know about any other investment companies/capital management companies that have invested in or plan to invest in bitcoins?
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207
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Bitcoin / Development & Technical Discussion / Re: How computationally expensive is an ECDSA and signature calculation?
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on: September 23, 2013, 10:58:07 AM
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Visa and Mastercard are upgrading EMV to use an ECDHE handshake between card and terminal. So regular credit cards will be able to do at least some EC crypto soon.
However those card chips are proprietary and cannot be programmed.
It's the wrong model for Bitcoin anyway. Look at the Trezor instead.
Why is it the wrong model for Bitcoin? The good thing about is that customers are used to smart cards and POSs. And a correctly designed smart card can, in the POS, do exactly what Trezor does. |
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208
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Bitcoin / Development & Technical Discussion / Re: How computationally expensive is an ECDSA and signature calculation?
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on: September 22, 2013, 01:21:59 PM
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A card chip can do it.
The card I use however uses a cryptographic co-processor to do the signatures so the cheapest cards usually cant do it.
It takes less than a second, though I did not time it more exactly than that.
Thank you for your answer. That sounds very exciting! Do you have a link to a report or some numbers where I can read more about it? Edit: Just found your thread on this. Will be reading up on it. |
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209
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Bitcoin / Development & Technical Discussion / How computationally expensive is an ECDSA and signature calculation?
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on: September 21, 2013, 08:06:00 PM
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I do not know how much a bitcoin credit card has been discussed on this forum. By a bitcoin credit card I mean a credit card containing the private key (encrypted of course) capable of making and signing bitcoin transactions to the network such that the chip itself calculates the writes the transaction and signature and the transmits it to a credit card terminal (POS) into which the credit card has been inserted. A search on this did not reveal anything. A transaction needs to be signed in order to be valid. The signature is calculated from the private key and some kind of hash(?) of the transaction using the ECDSA (Elliptic Curve Digital Signature Algorithm). My question is: How computationally expensive is it to sign a transaction and specifically, do you think that a chip on a credit card would be able to perform this calculation? I am thinking about normal credit card chips which follow the ISO standard 7816 and a standard called EMV. I believe that this is the chip being used in most credit cards: http://www.maximintegrated.com/datasheet/index.mvp/id/2949As far as I understand, these chips already perform other kinds of encryption calculations like triple DES and RSA: http://en.wikipedia.org/wiki/Smart_cardMore information on the interface can be found here: http://www.maximintegrated.com/app-notes/index.mvp/id/4029tl;dr: Can a DS5002 Secure Microprocessor Chip calculate 256 bit ECDSA? |
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210
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Bitcoin / Bitcoin Discussion / Re: What do you think about these security recommendations?
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on: September 20, 2013, 11:21:43 PM
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The BS to real information ratio isn't complimentary.
The point is to give newcomers to Bitcoin an idea about what to consider. I am not interested in going into ECDSA, ripeMD160, or SHA256. But if you have any suggestions for improvements I would love to hear it. What relevant information for newbies do you suggest that I include? |
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214
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Bitcoin / Bitcoin Discussion / Re: Instant Bitcoin confirmation time (IDEA)
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on: August 08, 2013, 01:14:41 PM
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The solution is green address.
Actually the solution is to not worry about it, it is really just another form of shoplifting. People who want to steal will find a way, and going through the register line is a bad way to do it because most places you will be caught on camera and eventually caught by law enforcement.
But double spends will be rarely attempted and I suspect the losses will likely be less than what is currently lost in debit/credit card transaction fees and chargebacks.
True. Trust and then Green addresses which is another form of trust. And green addresses are not a problem for the decentralized idea of bitcoins since they are based on trust and not mandates. |
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216
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Local / Skandinavisk / [ANN] Køb bitcoins hos Sirius Money - også med kontanter!
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on: August 06, 2013, 07:12:01 PM
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Kære forum Sirius Money er en nystartet bitcoin-forhandler, og vi tilbyder nu køb og salg af bitcoins til det danske og hele det europæiske marked! Vi tager imod nationale danske bankoverførsler samt europæiske (SEPA) overførsler, så nordmændene, svenskerne og finnerne også kan være med. Vi accepterer også kontanthandler, og vi har pt. mulighed for at foretage kontanthandler i København og i Aarhus. Vi håber dog på at udvide dette netværk for fremtiden, så hold øjnene åbne. Kontaktoplysninger kan findes inde på www.siriusmoney.com, hvor det også er muligt at afgive ordrer. Her kan man både købe bitcoins vha. elektroniske overførsler samt såkaldte paper wallets, hvor alle og enhver kan komme i besiddelse af bitcoins uden at skulle oprette en bitcoin-konto - man modtager blot en konvolut med posten. Perfekt, hvis du vil købe bitcoins til dine familiemedlemmer, som måske ikke er så teknisk kyndige. |
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217
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Economy / Marketplace / Buy and sell bitcoins in Europe - New bitcoin trader
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on: August 02, 2013, 03:23:17 PM
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Dear Bitcoin community! Sirius Money has recently launched a website on siriusmoney.com where you can buy and sell bitcoins. We are currently only servicing European citizens and residents. We accept bank transfers from all over Europe as payment and we accept cash if you are able to come to Copenhagen Denmark where our headquarters are located. We plan to add more cities in which we will accept cash trades in the future, so keep your eyes open! Take a look at our web page and let us hear what you think. We are currently in the start-up phase but everything should work as intended and we are open for trade. Regards, Thorkil Værge AKA Sword Smith co-CEO of Sirius Money |
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219
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Other / Meta / Re: My Bitcoin Forum account has been compromised!!
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on: June 07, 2013, 10:29:55 AM
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This account seems to have been hacked. Please quote this in another thread so that the attacker cannot
I will update this thread if the attacker does not delete it :/
Do not make any deals with this account until I sign a message saying everything i OK.
WOW a lot of bitcointalk accounts are getting compromised. Theymos 2FA is need! I got some emails from Yahoo saying my email had been accessed from Russia. And later I got some info about a verified btc-e transaction. All clues point to btc-e imho. Please quote OP in another thread |
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220
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Other / Meta / My Bitcoin Forum account has been compromised!!
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on: June 07, 2013, 10:21:54 AM
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This account seems to have been hacked. Please quote this in another thread so that the attacker cannot
I will update this thread if the attacker does not delete it :/
Do not make any deals with this account until I sign a message saying everything i OK.
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