The annual amount of energy that our sun emits is about 1.21*10^34 Joule. Dividing this with the per bit-change energy, we could provide power for our ideal computer to perform 2.74*10^56 bit changes. This is just about enough to have a 187-bit counter go through all its states. This does not include the energy needed for the computations to test each key (our counter state in this case) for correctness.
A 256 bit counter would require ~400.000.000.000.000.000.000 stars like our sun just to represent in the counter of our ideal computer.
Or, to say it in the words of Bruce Schneier:
"...brute force attacks against 256-bit keys will be infeasible until computers are built from something other than matter and occupy something other than space".
Note: I am not talking about potential attacks against the algorithms here, etc. only pointing out that encryption is definitely not ALWAYS breakable by brute force.
And the only ones who can mine them are criminals stealing other peoples PC to do the mining. Someone here said its impossible to make a profit mining with one PC as the cost of mining it far greater then the profit.
Bitcoin mining these days is done using ASICS, not PC's...
I see no benefit to me to use, buy bit coins. I use dollars why should I switch unless to do something criminal?
Just because you don't see a benefit, doesn't mean it can't be beneficial to someone else in a different situation from your own. People didn't see much use to oil at first either. Doesn't mean the only other thing one can do with it must be something criminal...
- count points on elliptic and hyper elliptic curves on a distributed parallel system for cryptography research
- simulating electric motor magnetic fields, forces and temperatures on said parallel system
"The geomorphology of the region is largely shaped by the combined processes of glaciation, glacial retreat and the emergence of new land from the sea which continues today at a rate of 0.9 m per century."
The study of human history and prehistory through the excavation of sites and the analysis of artifacts.
WWI definitely qualifies as history...
"This shows a customized desktop environment for the Raspberry Pi primarily based around Cairo-dock and XFWM4. It has several performance tweaks applied. It furthermore shows the i.AM GPS Mapper application and some of its features running on the Raspberry Pi. Care has been taken to allow best performance on this low power system, but not all optimizations are present in this demo. It also does not take advantage of Wayland/Weston (that's planned for when those become more stable), so everything is done on the CPU and no offloading to the GPU is done!""
QtWebKit on desktop platforms (Linux, FreeBSD, Windows) is fast by the way. We did some tests on a Raspberry Pi and QtWebkit is faster than e.g., Midori (also Webkit based, and the default on the R-Pi).