Quote from: MoMoneyMonetarism on December 17, 2013, 08:39:13 PM

Thank you so much for contributing amincd!

Quote from: amincd on December 17, 2013, 08:20:10 PM

Proof of Stake could be combined with Proof of Work to make a >50% attack more difficult:

http://gavintech.blogspot.ca/2012/05/neutralizing-51-attack.html

Abandoning a pure Proof of Work consensus arrival process has some pretty big disadvantages however.

I apologize for giving the impression that I support abandoning Proof of Work. I have seen the arguments for a hybrid PoW/PoS system, and I wholeheartedly agree.

Would you mind giving your opinion on the viability of "Proof of Presence" combined with PoW/PoS to thwart secret chain attacks for high transaction verification speeds?

If it is too weak in its rawest form, forbidding consecutive blocks verified by a single address, could you give a suggestion on a more complex version?

Thank you so much in advance for helping me to understand this problem!

I wasn't able to understand how your proposed "Proof of Presence" system would work. Given there's no way to identify the creator of a block, there would be no way to know when consecutive blocks are created by single party. If you can explain how other network participants would know who is creating the blocks, I would appreciate it.