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Questions tagged [voting]

Voting is a method for a group such as a meeting or an electorate to make a decision or express an opinion.

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2answers
5k views

How is the Swiss post e-voting system supposed to work, and how was it wrong?

I read that the Swiss post had an e-voting solution developed, made it possible to obtain the source code for review, and that vulnerabilities were found. Apparently we are not talking about the ...
2
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2answers
275 views

Any ideas to make an Electronic Voter Machine more secure? [closed]

EVMs are not secure they say. So how can we make it more secure tham the existing one using cryptography?
4
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1answer
87 views

What is chain voting?

I read The Three Ballot Voting System by Rivest. This paper-based voting system can be attacked with chain voting. But can't find any description of what "Chain voting" is mentioned in section 4.9. ...
0
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0answers
50 views

Helios voting system voting verification

In the decryption step in helios, why do we need Chaum-Pedersen to prove that a certain plaintext $m$ corresponds to a given ciphertext $c$? Why can we just encrypt $m$ and see if it's equal to $c$?
0
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0answers
31 views

Helios: Where are admin tools stated in the paper

I read the Helios Paper Helios: Web-based Open-Audit Voting. In section 4.4 Anonymization they are saying that "once the voting period ends" the admin can "shuffle" (re-encrypt and permutate), "...
0
votes
1answer
106 views

How might one create a system of election by lot (sortition) that is both secure and verifiable?

I've been puzzling recently over sortition, a democratic method of selection for public office which I find very fascinating. Basically, instead of choosing candidates like Hillary Clinton or Donald ...
1
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3answers
56 views

Non-interactive public sum of private values

Suppose there is a large number of participants each with a secret value. The secret values are very large (e.g. 256-bit integers). Each participant has published a public commitment to their secret ...
2
votes
1answer
144 views

Anonymity of Paillier cryptosystem in e-voting system

I'm not an expert so at the moment I'm trying to figure out (at high level) how such cryptosystem would exploit it's homomorphic properties to guarantee anonymity in a e-voting system. As far as i ...
0
votes
1answer
107 views

Non interactive ZKP that encrypted additive elgamal message is in set of valid messages

This is taken from Anonymous voting by two-round public discussion by F. Hao P.Y.A. Ryan P. Zielinski Votes are encrypted using the additive variant of ElGamal. I am also using ECElgamal. The idea is ...
1
vote
1answer
125 views

Revealing vote after time

Imagine we have 5 different parties, all of these parties test if a particular thing is true or false over the course of 24 hours. The network needs to come to a consensus about the majority outcome ...
1
vote
0answers
53 views

Aggregating Votes

Voters may vote 0 or 1. We want to aggregate their votes, proving runs efficiently $O(n)$ in number of votes but verifying runs $O(1)$ or $O(\log n)$. Voting has to be cryptographically secure - no ...
0
votes
1answer
82 views

Secure way to Tally Votes

I want to find a secure and efficient way to tally votes. Say we have N ~ 10000 voters. Each one can vote for candidate 1, candidate 0, or both. But no one can vote more than once. The groups who ...
3
votes
1answer
176 views

Cryptographically secure shaming

I was thinking of the problem of naming&shaming, victims don't want to reveal themselves. Yet the public wants to know, and have some confidence in the veracity of statements. Such confidence ...
2
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0answers
111 views

How does threshold decryption with secretly shared exponents actually work?

Imagine the case where you have a sufficiently large finite field (or any multiplicative field for that matter) $\mathbb{Z}_{p}$ where p is some large prime. Now, I have a number $g \in \mathbb{Z}_{p}...
2
votes
3answers
239 views

Privacy of vote from tallying authority in El Gamal Voting Schemes

I've been reading this paper about ElGamal encryptions and its application in electronic voting: http://www.win.tue.nl/~berry/papers/euro97.pdf Section 2.3 talks about using Shamir secret sharing so ...
4
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0answers
59 views

Draw/Lottery with hidden but provable outcome?

I have a scenario in which one of n participants is to be assigned a positive value and all other participants a negative value. The outcome of the draw is to be known only by the respective ...
7
votes
3answers
161 views

E-voting: public tallying vs. vote selling

There are many design goals for an e-voting system. My question concerns a conflict between 2 particular goals: A voter should be able to verify that their vote was correctly tallied A voter should ...
2
votes
1answer
344 views

Easy to implement proof of shuffle

I will be writing some code to implement a non interactive proof of shuffle. I intend to use it on a voting application that supports Borda voting. The voter must prove that her vote is valid, that is ...
14
votes
1answer
425 views

How to create a decentralized secret ballot among a small group of people?

A small (< 100) group wants to implement an election. For that, each participant must vote in one of N candidates. After everyone has voted, they must be able to determine a winner; yet, nobody ...
1
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0answers
45 views

Unique decentralized ID systems

We are all familiar with the standard decentralized ID system, the web of trust, e.g. for PGP keys. However, normal web of trust systems are unable to guarantee uniqueness — there's no practical limit ...
0
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1answer
48 views

How to run a (provably probably) secure global referendum?

The following question is extremely broad and speculative, for which I apologize, but it strikes me as exceedingly important, so I will ask it nonetheless. Suppose an event of global significance ...
8
votes
1answer
358 views

How do voters verify a Helios (v3) election result?

So from my understanding of verification specification version 3, a Helios election proceeds as follows: A voter retrieves the system's public key to encrypt their vote & submit it. The voter ...
3
votes
1answer
194 views

Why doesn't this operation reveal the voter's message?

I am working my way through this paper. I am trying to figure out the OR zero knowledge proof in figure 2. The prover is verifying that she has correctly voted, and that her input satisfies $$\log_gx=\...
4
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1answer
246 views

Have I made any glaring mistakes in my use of Yao's garbled circuits?

I would like to use garbled circuits to provide a service that allows people to vote where they do not need to reveal their votes to my server or to anyone else. Let's assume that I have secure ways ...
12
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3answers
597 views

Are there reasonably secure online voting implementations e.g. for student council elections?

Assume a university want to elect the student council. This was done via paper ballot and there is a need to reach more students for voting, so electronic voting is on the table. While researching ...
4
votes
0answers
80 views

Are there any real-world E-voting systems in use with the Paillier cryptosystem?

There are a lot of theories of Paillier cryptosystem with references to e-voting. Are there any real-world E-voting systems in use with the Paillier cryptosystem?
3
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1answer
194 views

Could eVoting on the bitcoin blockchain be done?

I'm basically a crypto noob (and not an english native), so please be indulgent :) I thought about if you could realize an eVoting system with bitcoin. I see 2 major requirements: each citizen can ...
1
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0answers
50 views

Voting protocol - How many dishonest tallying centres can the protocol cope with?

We have the voting protocol that is described here. I am looking at the following exercise: Determine how many dishonest tallying centres the protocol can cope with before the following properties ...
3
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0answers
84 views

During electronic voting, how does one hide the choice from Voting device?

Assume the following: I want to cast a vote during an election through an electronic voting system. For our system we make the assumption that the device one uses to cast the vote is potentially ...
0
votes
2answers
237 views

Voting system validation

I'm developing an application to run elections. A voting system. I would like to give the ability to the voters to check later if their vote were correct computed/casted. assumptions: each user has ...
2
votes
1answer
374 views

Proving correctness of a decryption of a homomorphically summed ciphertext?

I would like to take some additively homomorphic cryptosystem - don't care much which one for now - and encrypt a series of numbers with it. I would then like to (in public) take these numbers, add ...
3
votes
1answer
317 views

Homomorphic crypto allowing anonymous yes/no votes?

I'd need a crypto system allowing online yes/no votes but without revealing who voted what. Is a "partial" homomorphic crypto system what I'm after? Would, for example, Damgård-Jurik work in my case? ...
1
vote
1answer
330 views

Unique, anonymous online authentication

Is there a way to authenticate users online without knowing their real identity yet preventing them from registering twice? If not, what is the least amount of information you would need? If it helps, ...
9
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2answers
271 views

Voting scheme where the votes become public when a threshold is reached

Does there exist a voting scheme where voters cast private encrypted votes that automatically become public only after the threshold number of votes is cast? It needs to be done without a central ...
5
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2answers
211 views

Current Status of mixnets for voting

I am currently doing some research on universally verifiable mixnets, but it seems to me that there are too few papers about them after 2006 or so and most of them come from the team of Douglas ...
6
votes
1answer
177 views

How to construct a yes/no election protocol, such that only the result is revealed?

Can we use a threshold scheme to construct a (yes/no)-election protocol, such that every voter can give a positive or negative vote or he can abstain, and such that only the result of the election is ...
10
votes
1answer
5k views

Can Elgamal be made additively homomorphic and how could it be used for E-voting?

Elgamal is a cryptosystem that is homomorphic over multiplication. How can I convert it to an additive homomorphic cryptosystem? How can I use this additive homomorphic Elgamal cryptosystem for E-...
3
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5answers
4k views

Approach towards anonymous e-voting

I want to implement an internet-based e-voting system. Voters shall be able to cast their vote for one out of n possible candidates. Each candidate has his own ballot-box kept by and at a trustworthy ...