> Note also that it is possible at low cost to rent very large amounts of storage and computation for short periods of time in order to mount a 51% attack on a PoSp/VDP network in the same way that "mining as a service" enables 51% attacks on alt-coins.
> For example, a back-of-the-envelope computation of a hour-long Petabyte attack at Amazon would start by using about 7 days of AWS Free Tier to write the data to the sc1 version of Elastic Block Storage. The EBS would cost $35/PB/hr, so the setup would cost $2940. Then the actual hour-long attack would cost $35, for a total of just under $3000.
> I'm skeptical that the low-reward approach to maintaining decentralization is viable.
https://blog.dshr.org/2018/03/proofs-of-space.html
https://blog.dshr.org/2018/09/chia-network.html
> Note also that it is possible at low cost to rent very large amounts of storage and computation for short periods of time in order to mount a 51% attack on a PoSp/VDP network in the same way that "mining as a service" enables 51% attacks on alt-coins.
> For example, a back-of-the-envelope computation of a hour-long Petabyte attack at Amazon would start by using about 7 days of AWS Free Tier to write the data to the sc1 version of Elastic Block Storage. The EBS would cost $35/PB/hr, so the setup would cost $2940. Then the actual hour-long attack would cost $35, for a total of just under $3000.
> I'm skeptical that the low-reward approach to maintaining decentralization is viable.