A blockchain-based voting platform

This is quite interesting in signalling preferences: https://colony.io/budgetbox.pdf?mc_cid=2887bf737e&mc_eid=494078b35d

Public Gitlab repos (mostly empty for now): https://gitlab.com/echo-protocol

@willabramson This might be interesting to your lot ;)

Thanks, it makes for an interesting read. Will share with the lab. I am wondering why the cryptosystem wants to be multiplicative homomorphic rather than additive. What am I missing here?

Hey Will, thanks!

With a multiplicative homomorphic crypto system you can conduct votes with an unlimited amount of choices each represented by a prime number.
Ballots are encrypted and aggregated by multiplying the encryption ciphertexts.
Once the vote ends you can decrypt the aggregate and you get the product of all un-encrypted ballots.
You can then obtain the individual scores of each choices by computing the prime numbers decomposition of this decrypted aggregate.

So the multiplicative homomorphy takes advantage of the fact that any integer can be uniquely decomposed as a product of prime numbers.

I nearly understand this :p

Ah I see, so the number of votes for each item is determined by the power to which the prime number that represents that item is raised?

yep :)