mantype3 said:
The first 6 mil Bitcoins were mined with very little difficulty by few people that started early, so they essentially got "free lunch"...
Not really, since at this point it was not known that Bitcoin ever would be accepted and would be worth anything. It was a highly experimental idea only, more like a computer game for tech freaks than anything else connected with real value. Edit: Real value only comes in when a currency is trusted.
whitecoast said:
However, according to the Cs the PTB have technology that is over a century ahead of what's commercially available. Given that, they could either use that superior processing power to subvert and implode the market, or use it to mine application the bitcoins out of reach for most other people and start cornering the market.
On the other hand, since Bitcoin is completely transparent, and all and every transactions are broadcast to everyone, nothing is a secret. So, whoever would do it, would risk his own exposure or at least risk the questioning of the validity of his defrauded wealth.
From the original paper by the Bitcoin inventor "Satoshi Nakamoto":
http://bitcoin.org/bitcoin.pdf said:
The network timestamps transactions by hashing them into an ongoing chain of hash-bashed proof-of-work, forming a record that cannot be changed without re-doing the proof-of-work. The longest chain not only serves as proof of the sequence of events witnessed, but proof that it came from the largest pool of CPU power. As long as a majority of CPU power is controlled by [peer] nodes that are not cooperating to attack the network, they'll generate the longest chain and outpace attackers.
This is especially interesting in the view of the system of normal people vs. pathological individuals. In our current system, the small percentage of psychological deviants (about 6%) have managed to dominate the rest (94%). However, Bitcoin is based on the principle that as long as there are more "honest" nodes, the "inhonest" ones can never "outpace" them. It is a "majority" decision.
http://bitcoin.org/bitcoin.pdf said:
Proof-of-work is essentially one-CPU-one-vote. The majority decision is represented by the longest chain [of transactions], which has the greatest proof-of-work effort invested in it. If a majority of CPU power is controlled by honest nodes, the honest chain will grow the fastest and outpace any competing [transaction] chains. To modify a past block, an attacker would have to redo the proof-of-work of the [modified] block and all blocks after it and then catch up with and surpass the work of the honest nodes. We will show later that the probability of a slower attacker catching up diminishes exponentially as subsequent blocks are added.
Bitcoin is incentive based, to encourage playing by the rules. The incentives to mathematically "solve" or "mine" the hashes for each transaction block is to 1) earn Bitcoins until all 21 Million Bitcoins are in circulation and 2) earn small transaction fees for all transactions in that block. Also, an attacker could only "steal back" coins that he already has spent. He cannot simply steal coins from others that he never had, which makes the incentive to cheat mathematically pretty uninteresting:
http://bitcoin.org/bitcoin.pdf said:
The incentive may help encourage nodes to stay honest. If a greedy attacker is able to assemble more CPU power than all the honest nodes, he would have to choose between using it to defraud people by stealing back his payments, or using it generate new coins. He ought to find it more profitable to play by the rules, such rules that favour him with more new coins than everyone else combined, than to undermine the system and the validity of his own wealth.