Some pieces of software "encrypt" passwords with base64 or XOR and make them look garbled and that gives you false sense of security. But in reality these passwords can be decrypted in milliseconds by anyone.
So technically did those who held sit-ins at whites-only lunch counters...
Any state run by the GOP/TEA/KKK fringe already has the dictatorship.
The problem is that some of them (like mine) have electronic ignition. The circuit uses a couple of transistors so it could be susceptible to RFI (it would most likely need a stronger signal to start misbehaving), though I guess it would be much easier to shield that than to shield the electronics in a modern car.
OTOH, cars with contact breaker ignition should be immune to this. Or old diesel cars.
How do they know it with digital TV?
DVB-T - simplex transmission, just like analog.
DVB-C - also a simplex transmission.
They can only track you if you use IPTV or connect the box to the internet so it can phone home.
However, you could shorten the blockchain by calculaing the balances and then dropping the old blocks.
A mines 50BTC (before the reduction)
some time later A sends to B 10BTC.
then B sends to C 4BTC.
C sends to A 1BTC.
This could be simplified (when the transactions get a couple of years old) to
Now when A, B or C sends coins, you can just check it against their balance and all transactions since then.
Well, it works like this:
In the event that two miners manage to mine a block (lets call them A and B blocks) a the same time, the blocks propagate trough the network and various other miners start mining the next block (lets call it C) using A or B as "previous block" - depending on which block they received first). When somebody mines block C, the chain including C becomes the longest and the only one valid.
However, usually blocks will be seconds or minutes apart with the previous block given enough time to propagate trough the network.
The fact that it can be divided to 8 decimal places and the ability to easily transfer it over the internet is what makes it a better alternative than, say, gold.
Yea, instead of using BTC people could just use gold (and have limited supply etc), but it is difficult to transfer any amount of it to someone who is not physically there with you and it also is a bit of a problem to give, say, $1 worth of gold accurately. OTOH, you can transfer 0.0001BTC with no problems.
Save the whales. Collect the whole set.