Некоторые биржи сразу на свои счета принимают указанные тобой платежи, и далее можно уже торговать.

Да, можно. Перевод идет по времени как стандартный перевеод между кошельками. Если конечно в обоих биржах в этот момент будет все четко.

Покупать крипту в обход биржи - это дебилизм вообще, через обменники там в любом случае будет конская комиссия. Биржи для того и созданы чтобы крипту продавать покупать.

 Я лично смотрю форклог, битсмедиа, и коинтелеграф. Еще есть парочка чатов в телеграмме.
Мне хватает.

Без денег с вами работать никто не захочет, ибо научены уже горьким опытом проведения ико-скамов, когда несколько месяцев пахаешь бесплатно, а потом "ну извините не собрали капу".
Так что ребят или раскошеливайтесь, или сами работайте.

И в чем это смысл ставить два кошелька, не пойму.

Зачем обменники, если есть офшроные платежки, которые на прямую принимают биткоины, и дают возможность выводить их на карту сразу.

Можно распечатать, можно на флешке, можно где то в облаке. Можно и на всем сразу, но чем больше мест хранения, тем больше вероятность что их заполучит кто то другой.

Соотношение вознаграждения за подписную кампанию и социальную обычно не сильно отличается. Другой вопрос конечно что в социальных на много больше народу.

Да на форуме эти термины как то сами по себе в память западют, так что можно не париться с их выучиванием.

Как вариант - можно и самому создать кран, хотя тоже не особо много заработаешь, но все же больше чем просто клацать.

The transaction data in blocks is already highly optimized and compression would yield very minimal gains. However, there are numerous approaches to increasing block propagation... check out compact blocks and x-thin blocks.

Yes. Many thousands of hours....

Bandwidth can be bottleneck in terms of block propagation speed.
Processing power is a bottleneck too, especially for initial chain syncing.

So much for Honey Badger, it seems bitcoin might have a serious flaw, if what you are saying is correct.
Much cheaper than a 51% attack. Just spin up a handful of non-conforming nodes and mine an invalid block. Boom! And Bitcoin is done for.

Yes, absolutely better to physically remove wireless capabilities.  Older computers are better for this purpose, with Pentium-era laptops being a more than sufficient. As far as open BIOS and CPU... you have to ask yourself on an isolated machine, what is the 'sophisticated malware' embedded in the BIOS or CPU capable of doing? Exhilarating keys... perhaps, but being aware of the higher level software to the extent of being able to compromise different applications (which most likely didn't even exist at the time the supposed malware was written) in an identical fashion, which in this example would have to mean making the multiples instances give the same incorrect address derivation, I don't think is a plausible vector.

But yes, a modern machine where the wireless capabilities cannot be disabled, that is certainly riskier. One solution is to go somewhere with no surrounding wireless signals, like a cabin in the woods.




Yeah, my post didn't address a procedure for spending from the secure private keys.  You are right that contaminated drives are a risk.

For big balances, I would manually type an archived key into a clean, offline computer that had wallet software capable of generating an offline-transaction. Compare the transaction to one generated by different software. Copy onto a fresh thumb drive, and bring over to an online computer to broadcast the transaction.

For the truly paranoid, use multiple clean intermediary computers, with different operating systems. Copy the transaction onto the intermediary computer, and then copy it onto a clean thumb drive. The more hops, the less likely the private key is secretly getting dragged along with the signed tx.

A short word of 4 - 6 characters does reduce the entropy over a truly random key, but there would still be so much entropy left that it wouldn't make a practical difference. Using the OS's RNG is a good idea, and I would still strongly suggest making some alterations by hand.

The guide seems reasonable, and nice to see some work being put into this.

Here is my method for secure cold storage:

1) Start with clean, offline computer, with wireless capability disabled

2) Load a few different wallets and pieces of address generating software onto the computer

3) I used Bitaddress.org as my key generator. Crappy java-script RNG? No problem. Did I check the sigs? Nope. I let it generate a key pair, and use that as the starting point.

4) I modify the private key by hand! I make about 7 changes, including deletions, additions, and substitutions. I also add a short word to make visual confirmation easy. I just make sure the key ends up being the same length as it started out.

5) I import the modified private key into several other wallets, and confirm that every generated address is the same.

6) I archive private keys as appropriate, via encrypted thumb drives and paper backups which I cut (with scissors) into fragments and distributed.

7) The addresses I isolate and make available to online machines.


The nice part about this method is, between modifying the private keys by hand, and cross referencing address generation among different pieces of software, the opportunity for malicious software to compromise funds is severely limited.

The 21 Million is the current agreement, and very dear to many at that. But sure, if there was widespread agreement to raise the total, it could easily be done. I could foresee consensus emerging around raising the limit in the future if it was decided that the issuance of new coins was the most economically efficient way to pay for the continued security of the network. Paying for security once the block subsidy becomes insignificant is currently imagined to come from transaction fees, but it's possible that could fail to work in a reasonable way. If the network is funded solely via transaction fees, active users pay the whole cost of security, where as savers don't pay anything. I'm not advocating raising the limit, but just pointing out that there may be circumstances in the future where there is widespread agreement that raising the limit is the best path forward.

Some people may argue abandoning the limit is stealing, but bitcoin is voluntary, and that includes the right of people not to use it, or use a modified version of it.

If the day comes that you will ever need it, you are going to wish you had printed it out ahead of time.

Everyone would be happy to have the functionality, but hardly anyone would be willing to put up with the cost.  You probably just don't have a sense of what a block explorer entails based on your previous comment about already having the ledger on the computer.  The blockchain is basically a highly compressed record that is not amenable to quickly searching by address.  A service like blockchain.info has a custom database that they created from the blockchain, but who's data structures are searchable by address, balance, etc..  Such a database could be many times larger than the standard blockchain, and I think it would take something like a week of CPU time to do all the indexing.