[reddit][ethereum] Proof-of-Stake and Distributed Consensus are Incompatible

[toast]

Transactions as proof-of-stake... referencing recent block hashes in your transactions to prevent reversing history too far. Dan's brainchild

[xeroc]

http://www.reddit.com/r/Bitcoin/comments/29yyjm/proofofstake_and_distributed_consensus_are/

Vitalik on reddit:

That's not quite what I said. I said that every pure PoS system, except a PoS system with trusted chain download sources, can always and forever be taken over by a 51% collusion of the genesis block allocation. If you're willing to accept that, then TaPoS-based systems plus slasher plus some kind of yet-undiscovered transaction aggregation protocol seem to be quite viable, albeit flimsier in certain ways.

Whats TaPoS in ethereum language?