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Chciałem spytać, czy odnośnie Bitcoina jest jakaś technologia która na drodze soft/hard forka mogłaby go uodpornić na atak (jak rozumiem "typu 51%")?
Obecnie nie widać możliwości przeprowadzenia ataku 51% przez komputery kwantowe. Teoretycznie można by odzyskać klucz prywatny z publicznego, ale nie ma wystarczająco mocnych komputerów. Tylko czy alternatywne metody podpisów są już dobrze przetestowane? Coś słyszałem, że SegWit umożliwi uproszczenie dodania nowych metod podpisów. |
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About seed, see here: https://github.com/byteball/byteballByteball uses a single extended private key for all wallets, BIP44 is used for wallet address derivation. There is a BIP39 mnemonic for backing up the wallet key, but it is not enough. Private payments and co-signers of multisig wallets are stored only in the app's data directory, which you have to back up manually:
macOS: ~/Library/Application Support/byteball
Linux: ~/.config/byteball
Windows: %LOCALAPPDATA%\byteball
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I guess that, to create a new master seed, a new Local Trader identity, etc., I will have to move all bitcoins out of the HD wallet, uninstall Mycelium, install it again, create a new HD wallet, and restore all non-HD wallets from their backup.
You can use "Cold spending" to send Bitcoins from any HD wallet seed. |
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Now, please excuse me if this was already mentioned, as I just did a quick look at last few pages, but there is something I don't understand about this incident.
The pins burned on that pic are +3.3V/Ground (ATX 24pin, pins 2,3). How could RX 480 possibly draw so much 3.3V from PCIe to burn the ATX pin? The biggest draw measured on that line was 5W (PCper), with others pointing even lower values (2.5W during benchmark).
The burned pins are both +12V of ATX connector. I think you forget that pinouts are of the plug, not socket. Why only +12V burned? Because there are many more pins for ground, so each had less current. So it can technically feed more thru the 12+ then the ground can return. Yes there is some burnt off as heat but most comes back down the return. And if that isn't the same as the 12+ then you have meltdown. Kirchhoff's first law disagrees with this. Current incoming is always equal to current outgoing. Seen this many times now and that's the best I came up with as to why the 8 pin can deliver so much more and doesnt add anything more other than two more grounds and another voltage sensor. 6 pin can deliver much more power in reality. I know, I use it to power some devices from computer PSU. It's just about limiting how much power should be drained, probably because many PSU are crap. I would also like to state that -12V is almost not used today. It may by used by audio circuit on motherboard, but it's absolutely not used with +12V to power anything heavy. See how small current is allowed (specification of the PSU). Voltage is too small to create any arc. You make some bizarre explanation to explain bizarre situation, but it was just the +12V pins that burned because of too much load. |
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I'm going to do the forensics.
I don't want to generate the private key, like that bip39 mnemonic converter does. It's risky and unnecessary.
I will use the pubkey.
Where is a tool that I can use to generate the list of addresses from the pubkey?
You can try http://bip32.org/ or https://dcpos.github.io/bip39/It would probably be easier to import pubkey to some wallet, for example Electrum. |
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You can check it by importing somewhere (for example Electrum) master public key and checking distribution of fund in addresses.
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It's easy to turn an app off on the tablet. Touch the apps button and swipe an app or apps off the screen.
But with the phone, turning an app off isn't so straightforward. On the phone, swiping an app off the running apps screen doesn't work, or you didn't try? It works for me (CyanogenMod 12.1). You should be able to open it by long press of home button. |
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You can also create new account, switch to that account and lock account list. Not very convenient, but it works.
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I have uninstalled the Mycelium app and I would advise others to do the same.
what platform you mean now? IOS or Anroid? Because I never had any issues with Android one.. im assuming hes talkinf about the iOS one, ive tried using it before but it just doesnt work well, transactions take half a day to show up in the wallet. the android one on the other hand works exceptionally It shouldn't matter which one you are using, they should both function the same way. An update might be in order on iOS for it to work out any bugs. 9.1 is out now. Maybe they should function the same, but they don't. www.reddit.com/r/Bitcoin/comments/36ke99/mycelium_iphone_vs_android/It carries the brand name because the owner of mycelium decided he wants to have an iOS version as well. And it was developed by an external developer, because we - the Android devs - neither have the time nor the skill nor the intention to make an iPhone version. |
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I asked for it, but I don't remember getting any reply. * Support for Cold Storage spending from masterseed keys
Very good. Would be better if one could type master seed in the cold storage spending instead of copying it from somewhere else  Ah yes, I use master seed QR codes, but we should (and will likely soon) add the ability to just type the seed.
I would like to remind about that. Also, could you add the possibility of sending to/from password protected version of stored (main) master seed? I don't see why I should type/scan master seed when I want password version if it is stored by Mycelium anyway. There is no (or I don't know one) easy way to send to password version of master seed. I have to initialize Mycelium, or use some special tool to generate address. |
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I think that Cyanogenmod patched this.
Encrypting secret is useless, as attacker can replace Mycelium with fake and just wait for user to enter PIN.
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* Support for Cold Storage spending from masterseed keys
Very good. Would be better if one could type master seed in the cold storage spending instead of copying it from somewhere else Ah yes, I use master seed QR codes, but we should (and will likely soon) add the ability to just type the seed.
I would like to remind about that. Also, could you add the possibility of sending to/from password protected version of stored (main) master seed? I don't see why I should type/scan master seed when I want password version if it is stored by Mycelium anyway. There is no (or I don't know one) easy way to send to password version of master seed. I have to initialize Mycelium, or use some special tool to generate address. |
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It's not the only way. You can also create several HD accounts. Also, Mycelium scan address ahead - you can use xpriv/xpub to generate it.
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Not trying to start an o/t flame war here, but Google and Apple (and even Ubuntu to some extent with their search provider deals) don't have the best privacy/security track records either.... I see no reason MS phones are much if any worse.
With Android you have more choice than Google (Cyanogenmod and others). Your security depends on you, while MS/Apple have more control over your phone than you. FYI: I find new monthly backup seed reminder EXTREMELY annoying.
I understand the need for torturing new users to make a backup... and you indeed should torture them to hell until they finally do make a backup...
...but once it's done... please leave users alone or at least make a "don't ask me again" option or something...
What monthly backup seed reminder? I have never seen it. Did you import/create address not from seed and didn't backup? Seed doesn't need repetitive backups. I finally could find the private key of the address I use to send the funds for the crowdfunding.
Don't worry about security. I did it off line from a never-conected-to-internet-netbook.
I just need now the WIF key from that private key to claim the tokens of the crowdfunding.
I'm not sure how to do that ...
The private key from https://dcpos.github.io/bip39/ is in WIF format, isn't? |
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However, I also still had an old Mycelium wallet on my previous phone (which is now broken). I have the 12 word seed. Is there any other, perhaps temporary wallet (preferably online) where I can import the seed for my old Mycelium version, so I can send the remaining bitcoins from there to my new wallet?
You don't need anything but Mycelium. You can just use cold storage / offline wallet spending. You would need to make QR-Code of the old seed, or write it in some text editor and than copy to clipboard. In the menu of Mycelium (right up corner) should be "Offline wallet", or something like this. I'm not sure of name because I don't use English in my smartphone. |
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* Support for Cold Storage spending from masterseed keys
Very good. Would be better if one could type master seed in the cold storage spending instead of copying it from somewhere else |
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Just keep in mind that you need to select 'Mycelium' or manually put in m44 for the der path.
You didn't check, did you? Actually, 'Mycelium' doesn't work. It give the xprv of receiving (external) adresses, and Electrum expects more "general" xprv, to generate both receiving and change (internal) addresses. You need to use "BIP32" and give the m/44'/0'/0' (instead of m/44'/0'/0'/0 used in Mycelium tab) derivation path. It works with first Mycelium HD Account. I didn't check, but next should be like m/44'/0'/1', m/44'/0'/2' and so on. |
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any ETA for the launch?
Still hoping for end of this year or early the next. Any update? It's almost Q2 of new year. |
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birr: I think the easiest way for you would be importing the whole account to client that support signing, like Armory
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