NikhilPeri

Anonymous Verifiable Database

This document outlines solutions to building the database for a voting system with the following features:

• Anonymous means that it is not possible to associate a vote back to a single citizen, but a citizen can log back in and review their ballot was cast correctly.
• Personally Verifiable means that we can automatically detect their vote was counted as they cast it this is something that is not possible in the current voting system
• Publicly Verifiable__ means that we can automatically go through the database and independently count the votes and ensure they have not been altered

NikhilPeri

Youtube I DONT watch JOE ROGAN!

NikhilPeri

import numpy as np

print "Question 1"

a = np.array([
    [1, 2, 3, 4],
    [1, 1, 1, 1],
    [1, 2, 1, 2],
    [1, 2, 1, 1]
])

NikhilPeri

# PS this would make a great interview question

def map_int(i, state):
    i = ord('0') + ( i + state ) % 9
    state += i
    return i, state

def map_lower(c, state):
    x = ord('a') + (c + state ) % 25
    state += x

NikhilPeri

Overview

Cypher is declarative

MATCH // define graph shape
(A)-[HAS]->(B)

WHERE // filter graph 
A.status = 'Active'