Latest posts of: Newar

Quote from: BTCfan668 on October 10, 2014, 11:13:31 PM

Most people do not send bitcoin directly from their cold storage to the address(es) they are sending to. In my experience most businesses will have a "hot wallet" that will contain a "target" amount of bitcoin. If the hot wallet gets too low then bitcoin will be transferred from their cold storage into their hot wallet. If the hot wallet starts to get too much bitcoin then the company will transfer some of the bitcoin to their cold storage

I guess it's because "most people" don't use Armory.

Quote from: Eisenhower34 on October 11, 2014, 04:13:11 AM

If it is in there, in theory it can be used. Some people want to use thicker "tinfoil hats" then others. I personally don't think it is necessary to go to these extremes (or to the extremes that CIYAM went to above) as I believe the incremental amount of security is low

Only if the attacker has access to the device. At that point I wouldn't worry about USB/wifi security issues anymore. You got a bigger problem then.

Quote from: spin on October 10, 2014, 09:06:44 AM

[...]
(Of course given that it's now a sentence on a bitcoin related site, using it now would be suicide!)

Yeah, why bruteforce when you can wordlist? http://arstechnica.com/security/2013/10/how-the-bible-and-youtube-are-fueling-the-next-frontier-of-password-cracking/

Quote from: picobit on October 09, 2014, 07:08:14 PM

[....]
I *think* it is barely out of reach of a brute force search, but honestly I have no clue.

https://dl.dropboxusercontent.com/u/209/zxcvbn/test/index.html gives an entropy of 194 bits.

Scroll down a bit more Wink

Quote

(1) Planning papers for getting the authorisation and for building the rotation tank.

(2) Single licence.

(3) Coarse screen, weir gate and inflow gate.

(4) Zotlöterer turbine made in INOX.

(5) Supporting construction with turbine bearing and turbine axis.

(6) High efficient gear and generator.

(7) Easily operated Control box for open air condition - made in Aluminium.

I agree Zotloeterer is probably more expansive. You also could argue China quality vs. Austria quality, but in the end the location and topography dictates what you can use.

The way the Peltonturbine works you are also looking at building a basin of sorts at the top of the head and from there a straight downpipe to the shed where you have the Turbine.

Quote from: trasla on October 10, 2014, 12:39:44 PM

Quote from: Newar on October 10, 2014, 09:10:02 AM

Synchronising definitely takes noticeably longer "all the time" with the new release for me.

How long doe sit approx take?
Do you have a very big amount of accounts and large number of keys in accounts?
We tested with accounts which had hundreds of keys and transactions.

What can really take some time is monitoring an address with very large numbers of unspent outputs.
Usually, an address just has few unspent outputs, but if you for example monitor some crowd-funding or donation address, which has hundreds or thousands of unspent outputs, it takes some time, since we verify all parent transactions for those in the app to make sure our servers can not trick our users.

17 seconds on the initial start from the home screen, 10 seconds when the black screen was on, but the app was "open" behind it. Previously it was maybe 2 or 3 seconds.

I don't think I have anything spectacular. 7 Keys in the new HD account and a single address from before, but that one has the few outputs it ever had completely spent.

Samsung GT-I9082 Android 4.2.2

Quote from: inBitweTrust on October 10, 2014, 12:00:33 PM

Quote from: Newar on October 10, 2014, 09:42:01 AM

Quote

This particular unit (14′ diameter), with 5′ head of water and a .7 m³/s flow, can produce approximately 120 kWh daily. That’s enough power for 4 average US homes. At a kit cost of approximately $45k USD, that’s about a 7 year payback if maxed to capacity, and no subsidies are available. That does not include installation and concrete costs, or any permit fees.

With a 160 meter head and 0.087 m3/s of volume you can generate 100 kWh with a ~3 k usd turgo turbine.
http://www.aliexpress.com/item/Pelton-water-turbine-generator/1836459433.html

So you may need this product for certain areas or applications , but it would be wiser to select an area which didn't necessitate it.

As you can see, there are many designs with a wide price range depending upon your environment.

I would think a location with 5 feet head is easier to find than a 160 meter head location. Flow requirements seem similar. I agree, every situation is different. Looks like the 3k is just the generator? In the 45k are several things included (see their site), basically all you have to do is build the basin.

Quote from: hgmichna on October 10, 2014, 11:57:09 AM

Quote from: trasla on October 09, 2014, 05:47:49 PM

For HD accounts, you get a new receiving address whenever you receive money.

When I tap the Receive button, Mycelium shows the same HD wallet address, the only one I have, not a new receiving address. The statement above does not seem to be true for my Mycelium installation.

That confused me initially too, but after you have received for the first time, you will see a new address every time.

Quote from: hgmichna on October 10, 2014, 12:05:45 PM

[...]
I guess there is currently no other way. Of course I can keep the old account, but that would mean not having any of the HD advantages. [...]

IIRC, the address for Local Trader only works as a sort of identifier. You can send / receive BTC to any address you please.

Quote from: shorena on October 10, 2014, 10:23:22 AM

Quote from: Newar on October 10, 2014, 10:05:27 AM

Size wise, for example:
http://btc.blockr.io/block/info/256961
884.45 kB

I don't think there are much more options other than to pay that 1% fee or wait (A year or so? Don't know.) until they're more mature.

Big blocks yes, but big TX? 884KByte block with 3861 TX is still ~ 230 Byte per TX on average.
Bc.i lists "largest TX" [1] but they refer to value not size in bytes.
[...]

Right, how about this one: https://insight.bitpay.com/tx/e951e79d2140b1844d5058bd0f609e3939b040132a1d920ec89c55a2392ef83f

182160 bytes, close, but no cigar. Cool

Quote from: shorena on October 10, 2014, 09:59:36 AM

Quote from: Newar on October 10, 2014, 09:55:55 AM

Bitcoin Core is the only full client for Windows I believe, at least with a GUI, but get a more recent one than v0.8.1-beta. Why do you use such an outdated one? There have been several major bug fixes since then and the protocol got bumped ahead too.

Well there is armory, but its build on top of bitcoind, so it kinda is the same.

True, the advantage of Armory in relation to this OP's particular case is that it nudges you to get a more updated version, as they become available.

Quote from: inBitweTrust on October 09, 2014, 08:56:42 PM

Quote from: Newar on October 09, 2014, 08:37:45 PM

I like this one: http://www.zotloeterer.com/welcome/ If I could, I would.

Wow, I have seen 4 different categories of microhydro but this is a completely new one! Interesting product but a lack of prices and exclusive patents scare me ... their kit probably costs a fortune.

http://www.green-trust.org/wordpress/tag/hydro/

Quote

Quote from: CIYAM on October 10, 2014, 12:34:51 AM

Quote from: Newar on October 09, 2014, 07:04:05 PM

It's not a single key cold storage.

Not sure what you mean by this - but just to be clear you can have as many "keys" as you like using CIYAM Safe.

I understand that. I think the approach is different.

If I understand correctly, CIYAM Safe is meant to put coins in a cold storage as you would with a paper wallet. Put one bitcoin in address A and one in address B. Now, to spend 1.5 BTC for example in single transaction from CIYAM Safe I imagine is a bit tricky?

Whereas with Armory it will create a single transaction 2 BTC -> 1.5 BTC and 0.5 BTC change (to a new adddress) for you. It will also try and select the optimal inputs for a transaction.

I think they are just different solutions to different use cases.

Quote from: BIGbangTheory on October 10, 2014, 01:02:51 AM

Many computers with built in webcam have built in wifi so if the OP is trying to avoid using USB period then he would probably not to be dealing with a computer that could have it's wifi antenna enabled (although this is serious tinfoil hat status).

Disable it in the BIOS? Or in the OS on first run? Some come with hardware switches that you can super-glue in the off position? Not really a problem.

Quote from: mmortal03 on October 10, 2014, 06:38:53 AM

I look forward to such a feature. I don't know how you'd sign transactions on a phone by way of an external device that stores your private key (e.g. how Armory does it), but it would be awesome to see.

Apart from using NFC as linked, it also can be done via an "OTG" cable and Trezor for example. There is development under way for this. https://bitcointalk.org/index.php?topic=122438.msg8179813#msg8179813

Quote from: pm7 on October 10, 2014, 07:43:19 AM

Quote from: mmortal03 on October 10, 2014, 06:38:53 AM

I don't know how you'd sign transactions on a phone by way of an external device that stores your private key (e.g. how Armory does it), but it would be awesome to see.

https://bitcointalk.org/index.php?topic=610453.0 "Sigsafe: A NFC key tag for signing bitcoin transactions"
I think Newar wasn't writing about external device, rather something like paper wallet and existing read-only addresses in Mycelium.

No, I was talking about two phones. One in the shop set up as watch-only. The cashier uses the "Receive" button, enters the amount in local currency and displays the QR code to the customer. The other phone (or "device") safe with me and with the full set of private keys. This was easily done pre-HD, looking forward to see it in HD too!

Quote from: trasla on October 09, 2014, 05:39:07 PM

[...]
Synchronizing takes a bit longer the first time, because for HD some address discovery has to take place, but it should be fast for the next times.
[...]

Synchronising definitely takes noticeably longer "all the time" with the new release for me.

MrTeal and xjack, also thanks for the input. I will try those suggestions.

Quote from: Taugeran on October 09, 2014, 06:08:26 PM

I know it will sounds odd but I've enjoyed a certain amount of success using bfgminer
[...]

Thank you for the input. Which version are you using?

On 4.9.0 I get a ton of:

Code:

[2014-10-10 07:32:08] hashfast fd=40: SEND (aa0b035203000050) => -1 errno=5(Input/output error)
 [2014-10-10 07:32:08] hashfast fd=40: SEND (aa0b035303000046) => -1 errno=5(Input/output error)
 [2014-10-10 07:32:08] hashfast fd=40: SEND (aa0b035403000024) => -1 errno=5(Input/output error)
 [2014-10-10 07:32:08] hashfast fd=40: SEND (aa0b035503000032) => -1 errno=5(Input/output error)

and others which go past too quick for a copy and paste.

After a few minutes it quits with:

Code:

Segmentation fault (core dumped)

Quote from: jodyrb on October 09, 2014, 08:12:53 PM

In addition to the "Print" buttons, would it be possible to also add a "Save" button so that the wallet information could be saved on removable storage (for example, SD Card running Raspberry PI)?

Which OS are you using? You don't have the "Print as .pdf" option in your printer dialog?

Edit: Ok, RPi Wink

No option like that?

Quote from: inBitweTrust on October 09, 2014, 08:22:03 PM

[...]
The thread indicates-" Between 158% and 183% of the original investment has been repaid." so i don't think it was a total failure of a project even with the big mistake of using solar.
[..]

Note that those are DiabloD3's (thread OP) comments. Diablo Mining Company has never built anything. Because of issues like "zero expertise in anything related to this and very little general managerial experience" for starters. Any "return" was thanks to the BTC rate rising from IPO time to close down time and measured in USD. People who just held the BTC instead of investing in DMC were a lot better off. Total failure is a good description of that venture.

But I agree, as an enthusiast's project with the land and hydro requirements (and some places you need the rights to use that water too) and not expecting any or very little return - sure why not.

I like this one: http://www.zotloeterer.com/welcome/ If I could, I would.