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Implementation Requirements for UK General Elections TexPoint fonts used in EMF. Read the TexPoint...

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Implementation Requirements for UK General Elections Chris Culnane James Heather Steve Schneider Sriramkrishnan Srinivasan Zhe Xia (Joson)
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Page 1: Implementation Requirements for UK General Elections TexPoint fonts used in EMF. Read the TexPoint manual before you delete this box.: A A A A A A Chris.

Implementation Requirements for

UK General Elections

Chris Culnane

James Heather

Steve Schneider

Sriramkrishnan Srinivasan

Zhe Xia (Joson)

Page 2: Implementation Requirements for UK General Elections TexPoint fonts used in EMF. Read the TexPoint manual before you delete this box.: A A A A A A Chris.

Implementation Requirements

• First-Past-The-Post (FPTP) & Alternative Vote (AV)• Focus a single constituency (around 80,000 votes)• Multiple channel for vote casting (paper ballot & touch surface)• No special equipment needed (off-the-shelf hardware)• Threshold trust (distributed trust at least)• 128-bit security level• Ballot generation phase in 72 hours• Ballot tallying phase in 8 hours (10pm – 6am, 0.3s/vote)• Auditing of the ballot tallying phase in 72 hours• All votes information in a single DVD (4.7GB)• All the audit information in a single blue-ray disk (25GB)• Accessibility• Law issues

Page 3: Implementation Requirements for UK General Elections TexPoint fonts used in EMF. Read the TexPoint manual before you delete this box.: A A A A A A Chris.

1. First-Past-The-Post (FPTP)

or

Alternative Vote (AV)

Page 4: Implementation Requirements for UK General Elections TexPoint fonts used in EMF. Read the TexPoint manual before you delete this box.: A A A A A A Chris.

UK General Election 2010

Page 5: Implementation Requirements for UK General Elections TexPoint fonts used in EMF. Read the TexPoint manual before you delete this box.: A A A A A A Chris.

First-Past-The-Post (FPTP)Conservative

Labour

Lib Dem X

Others

Labour

102 101

Lib Dem Conservative

99 98

Others

Page 6: Implementation Requirements for UK General Elections TexPoint fonts used in EMF. Read the TexPoint manual before you delete this box.: A A A A A A Chris.

UK Election Reform

Page 7: Implementation Requirements for UK General Elections TexPoint fonts used in EMF. Read the TexPoint manual before you delete this box.: A A A A A A Chris.

Alternative Vote (AV)

Conservative 1

Labour 3

Lib Dem 2

Others 4

Labour

102 101

Lib Dem

Conservative

99

200

Alternative Vote is also called Instance Runoff Voting (IRV) sometimes

Others

98

120

179

230

170

Page 8: Implementation Requirements for UK General Elections TexPoint fonts used in EMF. Read the TexPoint manual before you delete this box.: A A A A A A Chris.

2. A single constituency

80,000 voters

Page 9: Implementation Requirements for UK General Elections TexPoint fonts used in EMF. Read the TexPoint manual before you delete this box.: A A A A A A Chris.

3. Multiple channel for vote casting

• Paper based surface

• Hybrid touch surface

Page 10: Implementation Requirements for UK General Elections TexPoint fonts used in EMF. Read the TexPoint manual before you delete this box.: A A A A A A Chris.

4. Off-the-shelf hardware

Page 11: Implementation Requirements for UK General Elections TexPoint fonts used in EMF. Read the TexPoint manual before you delete this box.: A A A A A A Chris.

5. Threshold trust• Threshold key generation

without a trusted dealer

• Threshold decryption

Page 12: Implementation Requirements for UK General Elections TexPoint fonts used in EMF. Read the TexPoint manual before you delete this box.: A A A A A A Chris.

6. 128-bit security level

Page 13: Implementation Requirements for UK General Elections TexPoint fonts used in EMF. Read the TexPoint manual before you delete this box.: A A A A A A Chris.

Key Length ---- ECRYPT II

Page 14: Implementation Requirements for UK General Elections TexPoint fonts used in EMF. Read the TexPoint manual before you delete this box.: A A A A A A Chris.

Key Length ---- NIST

Page 15: Implementation Requirements for UK General Elections TexPoint fonts used in EMF. Read the TexPoint manual before you delete this box.: A A A A A A Chris.

7. Time consideration• Ballot generation in 72 hours (1.2s /

ballot)

• Ballot tallying in 8 hours (0.3s / vote)

• Verification in 72 hours

Page 16: Implementation Requirements for UK General Elections TexPoint fonts used in EMF. Read the TexPoint manual before you delete this box.: A A A A A A Chris.

8. Data size consideration• All vote information in a single DVD

(4.7GB)

• All the audit information in a single blue-ray disk (25GB)

Page 17: Implementation Requirements for UK General Elections TexPoint fonts used in EMF. Read the TexPoint manual before you delete this box.: A A A A A A Chris.

9. Accessibility• 5-10 candidates

• No special knowledge needed

• Accessibility for disabled voter

Page 18: Implementation Requirements for UK General Elections TexPoint fonts used in EMF. Read the TexPoint manual before you delete this box.: A A A A A A Chris.

10.Law and patent issues

• Candidate list in the alphabetic order

• Some building blocks may be patented

Page 19: Implementation Requirements for UK General Elections TexPoint fonts used in EMF. Read the TexPoint manual before you delete this box.: A A A A A A Chris.

Building Blocks

• Prêt à Voter ballot form (uniform ballot for both FPTP and AV)• ElGamal with re-encryption mixes (no homomorphic tally)• Verifiable shuffle (Randomised Partial Checking)• Threshold key generation without a trusted dealer• Verifiable decryption (Chaum-Pedersen proof)

Page 20: Implementation Requirements for UK General Elections TexPoint fonts used in EMF. Read the TexPoint manual before you delete this box.: A A A A A A Chris.

Implementation Design

Election Manager

Candidate Names

Printers

Ballot SerialCandidate Names

Bulletin Board

Ballot Data

Tellers & Mix Servers

Polling Station Legal Guardian

Ballot Papers Sealed ID List

Booth

Signed Receipt

Ballot LookupVote Submission

Ballot Data, Vote

Page 21: Implementation Requirements for UK General Elections TexPoint fonts used in EMF. Read the TexPoint manual before you delete this box.: A A A A A A Chris.

Thank you!


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