Vote counting is done manually or by machines. Each has potential for accidental errors and intentional errors, or fraud.
Counts are simplest in parliamentary systems where just one choice is on the ballot, and these are often counted manually. In other political systems where many choices are on the same ballot, counts are often done by computers to give quick results. Tallies done at distant locations must be carried or transmitted accurately to the central election office.
Manual counts are usually accurate within one percent. Computers are at least that accurate, except when they have undiscovered bugs, broken sensors scanning the ballots, paper misfeeds, or hacks. Officials keep election computers off the internet to minimize hacking, but the manufacturers are on the internet. They and their annual updates are still subject to hacking, like any computers. Further voting machines are in public locations on election day, and often the night before, so they are vulnerable.
Paper ballots and computer files of results are stored until they are tallied, so they need secure storage, which is hard. The election computers themselves are stored for years, and briefly tested before each election.
Manual counting, also known as hand-counting, requires a physical ballot that represents voter intent. The physical ballots are taken out of ballot boxes and/or envelopes, read and interpreted; then results are tallied. Manual counting may be used for election audits and recounts in areas where automated counting systems are used.
One method of manual counting is to sort ballots in piles by candidate, and count the number of ballots in each pile. If there is more than one contest on the same sheet of paper, the sorting and counting are repeated for each contest. This method hs been used in Burkina Faso, Russia, Sweden, United States (Minnesota), and Zimbabwe.
A variant is to read aloud the choice on each ballot while putting it into its pile, so observers can tally initially, and check by counting the piles. This method has been used in Ghana, Indonesia, and Mozambique.
Another approach is for one official to read all the votes on a ballot aloud, to one or more other staff, who tally the counts for each candidate. The reader and talliers read and tally all contests, before going on to the next ballot.
A variant of all approaches is to scan all the ballots and release a file of the images, so anyone can count them. Parties and citizens can count these images by hand or by software. The file gives them evidence to resolve discrepancies. The fact that different parties and citizens count with independent systems protects against errors from bugs and hacks. A checksum for the file identifies true copies. Election machines which scan ballots typically create such image files automatically, though those images can be hacked or be subject to bugs if the election machine is hacked or has bugs. Independent scanners can also create image files. Copies of ballots are known to be available for release in Alabama, Arizona, Humboldt County CA, Michigan, New York State, and Dane County Wisconsin. The press obtained copies of many ballots in the 2000 Presidential election in Florida to recount after the Supreme Court halted official recounts. Different methods resulted in different winners.
Timing of manual countsEdit
The tallying may be done at night at the end of the last day of voting, as in Britain, Canada, France, Germany, and Spain, or the next day, or 1–2 weeks later in the US, after provisional ballots have been adjudicated.
If counting is not done immediately, or if courts accept challenges which can require re-examination of ballots, the ballots need to be securely stored, which is problematic.
Errors in manual countsEdit
Hand-counting can be boring, so officials lose track, or they fail to read their own tally sheets correctly at the end of the process. Average errors were under 1% in New Hampshire 1946-2002, though one town had errors up to 20%. Errors were 3% to 27% for various candidates in a 2016 Indiana race, because the tally sheet labels misled officials into over-counting groups of 5 tally marks, and officials sometimes omitted absentee ballots or double-counted ballots.
Intentional errors are fraud. Close review by observers, if allowed, may detect fraud, and the observers may or may not be believed. If only one person sees each ballot and reads off its choice, there is no check on that person's mistakes. In the US only Massachusetts and the District of Columbia give anyone but officials a legal right to see ballot marks during hand counting. If fraud is detected and proven, penalties may be light or delayed. US prosecution policy since the 1980s has been to let fraudulent winners take office and keep office, usually for years, until convicted, and to impose sentencing level 8-14, which earns less than two years of prison.
Cost of manual countsEdit
Counting took 86 seconds of staff time per vote ($0.36) when Washington State, USA, hand-counted one contest for governor in 2004 on 2,159,831 paper ballots, with a separate sheet of paper for each voter. The work was done in teams of two, one person reading, the second person recording, 43 seconds per vote, including recovery from mistakes, total 86 seconds of staff time.
Counting took 43 seconds of staff time per vote ($0.18) when Clark County, Nevada, USA, hand-counted 21 contests in 2004 on 1,359 ballots with all votes marked by machines on continuous paper tapes.
Counting took 32 seconds of staff time per vote ($0.15) when 3 counties in Georgia, USA, hand-counted about 40 contests in 2006 on 2,038 ballots with all votes marked by machines on continuous paper tapes; Counties ranged from 20–36 seconds per vote.
Counting took 9.6 seconds of staff time per vote ($0.04) when 2 citizens in Wisconsin tallied electronic images for each candidate in 2015, at 100 images per 4 minutes, so 2.4 seconds per image, times 4 citizens needed to tally 2 competing candidates. This does not include time to set up the system and access the files.
Optical scan countingEdit
In an optical scan voting system, or marksense, each voter's choices are marked on one or more pieces of paper, which then go through a scanner. The scanner creates an electronic image of each ballot, interprets it, creates a tally for each candidate, and usually stores the image for later review.
The voter may mark the paper directly, usually in a specific location for each candidate.
Or the voter may select choices on an electronic screen, which then prints the chosen names, usually with a bar code or QR code summarizing all choices, on a sheet of paper to put in the scanner. This screen and printer is called an electronic ballot marker (EBM) or ballot marking device (BMD), and voters with disabilities can communicate with it by headphones, large buttons, sip and puff, or paddles, if they cannot interact with the screen or paper directly. Typically the ballot marking device does not store or tally votes. The paper it prints is the official ballot, put into a scanning system which counts the barcodes, or the printed names can be hand-counted, as a check on the machines. Most voters do not look at the paper to ensure it reflects their choices, and when there is a mistake, 93% of voters do not report it to poll workers.
Two companies, Hart and Clear Ballot, have scanners which count the printed names, which voters had a chance to check, rather than bar codes and QR codes, which voters are unable to check.
Timing of optical scansEdit
The machines are faster than hand-counting, so are typically used the night after the election, to give quick results. The paper ballots and electronic memories still need to be stored, to check that the images are correct, and to be available for court challenges.
Errors in optical scansEdit
Scanners have a row of photo-sensors which the paper passes by, and they record light and dark pixels from the ballot. A black streak results when a scratch or paper dust causes a sensor to record black continuously. A white streak can result when a sensor fails. In the right place, such lines can indicate a vote for every candidate or no votes for anyone. Some offices blow compressed air over the scanners after every 200 ballots to remove dust.
Software can miscount; if it miscounts drastically enough, people notice and check.
- In a 2019 election in Northampton county, Pennsylvania, the software under-counted one candidate by 99%, reporting 164 votes, compared to 26,142 found in a subsequent hand-count, which changed the candidate's loss to a win.
- In a 2018 New York City election when the air was humid, ballots jammed in the scanner, or multiple ballots went through a scanner at once, hiding all but one.
- In a 2016 Maryland election, a comparison of two scanning systems on the same ballots revealed that (a) 1,972 ballot images were incorrectly left out of one system, (b) one system incorrectly ignored many votes for write-in candidates, (c) shadows from paper folds were sometimes interpreted as names written in on the ballot, (d) the scanner sometimes pulled two ballots at once, scanning only the top one, (e) the ballot printers sometimes left off certain candidates, (f) voters often put a check or X instead of filling in an oval, which software has to adapt to, and (g) a scratch or dirt on a scanner sensor put a black line on many ballot images, causing the appearance of voting for more than the allowed number of candidates, so those votes were incorrectly ignored.
- In a 2014 Stoughton, Wisconsin, election, all voters' choices on a referendum were ignored, because the scanner was programmed to look in the wrong spot on the ballot.
- In a 2010 New York election, 20,000 votes for governor and 30,000-40,000 votes for other offices were ignored, because the scanners overheated and disqualified the ballots by reading multiple votes in races where voters had properly only voted once.
- In a 2004 Yakima, Washington, election 24 voters' choices on 4 races were ignored by a faulty scanner which created a white streak down the ballot.
- In a 2004 Medford, Wisconsin, election, all 600 voters who voted a straight party ticket had all their votes ignored, because the manufacturer forgot to program the machines for a partisan election. Election officials did not notice any problem. The consultant who found the lost 600 voters also reported a Michigan precinct with zero votes, since staff put ballots in the scanner upside down,
- In a 2000 Bernalillo County (Albuquerque area), New Mexico, election, a programming error meant that straight-party votes on paper ballots were not counted for the individual candidates. The number of ballots was thus much larger than the number of votes in each contest. The software was fixed, and the ballots were re-scanned to get correct counts.
- Researchers find security flaws in all election computers, which let voters, staff members or outsiders disrupt or change results, often without detection.
When a ballot marking device prints a bar code or QR code along with candidate names, the candidates are represented in the bar code or QR code as numbers, and the scanner counts those codes, not the names. If a bug or hack makes the numbering system in the ballot marking device not aligned with the numbering system in the scanner, votes will be tallied for the wrong candidates. This numbering mismatch has appeared with direct recording electronic machines (below).
Recreated ballots are paper or electronic ballots created by election staff when originals cannot be counted for some reason. They usually apply to optical scan elections, not hand-counting. Reasons include tears, water damage and folds which prevent feeding through scanners. Reasons also include voters selecting candidates by circling them or other marks, when machines are only programmed to tally specific marks in front of the candidate's name. As many as 8% of ballots in an election may be recreated.
Recreated ballots are sometimes called "reconstructed ballots." The term "duplicate ballot" sometimes refers to these recreated ballots, and sometimes to extra ballots erroneously given to or received from a voter.
Because of its potential for fraud, recreation of ballots is usually done by teams of two people working together or closely observed by bipartisan teams. The security of a team process can be undermined by having one person read to the other, so only one looks at the original votes and one looks at the recreated votes, or by having the team members appointed by a single official.
When auditing an election, audits need to be done with the original ballots, not the recreated ones.
Cost of scanning systemsEdit
If most voters mark their own paper ballots and one marking device is available at each polling place for voters with disabilities, Georgia's total cost of machines and maintenance for 10 years, starting 2020, has been estimated at $12 per voter ($84 million total). Pre-printed ballots for voters to mark would cost $4 to $20 per voter ($113 million to $224 million total machines, maintenance and printing). The low estimate includes $0.40 to print each ballot, and more than enough ballots for historic turnout levels. the high estimate includes $0.55 to print each ballot, and enough ballots for every registered voter, including three ballots (of different parties) for each registered voter in primary elections with historically low turnout. The estimate is $29 per voter ($203 million total) if all voters use ballot marking devices, including $0.10 per ballot for paper.
The capital cost of machines in 2019 in Pennsylvania is $11 per voter if most voters mark their own paper ballots and a marking device is available at each polling place for voters with disabilities, compared to $23 per voter if all voters use ballot marking devices. This cost does not include printing ballots.
New York has an undated comparison of capital costs and a system where all voters use ballot marking devices costing over twice as much as a system where most do not. The authors say extra machine maintenance would exacerbate that difference, and printing cost would be comparable in both approaches. Their assumption of equal printing costs differs from the Georgia estimates of $0.40 or $0.50 to print a ballot in advance, and $0.10 to print it in a ballot marking device.
Direct-recording electronic countingEdit
A touch screen displays choices to the voter, who selects choices, and can change her mind as often as needed, before casting the vote. Staff initialize each voter once on the machine, to avoid repeat voting. Voting data and ballot images are recorded in memory components, and can be copied out at the end of the election.
The system may also provide a means for communicating with a central location for reporting results and receiving updates, which is an access point for hacks and bugs to arrive.
Some of these machines also print names of chosen candidates on paper for the voter to verify. These names on paper can be used for election audits and recounts if needed. The tally of the voting data is stored in a removable memory component and in bar codes on the paper tape. The paper tape is called a Voter-verified paper audit trail (VVPAT). The VVPATs can be counted at 20–43 seconds of staff time per vote (not per ballot).
For machines without VVPAT, there is no record of individual votes to check.
Errors in direct-recording electronic votingEdit
This approach can have software errors. It does not include scanners, so there are no scanner errors. When there is no paper record, it is hard to notice or research most errors.
- The only forensic examination which has been done of direct-recording software files was in Georgia in 2020, and found that one or more unauthorized intruders had entered the files and erased records of what it did to them. In 2014-2017 an intruder had control of the state computer in Georgia which programmed vote-counting machines for all counties. The same computer also held voter registration records. The intrusion exposed all election files in Georgia since then to compromise and malware. Public disclosure came in 2020 from a court case. Georgia did not have paper ballots to measure the amount of error in electronic tallies. The FBI studied that computer in 2017, and did not report the intrusion.
- A 2018 study of direct-recording voting machines (iVotronic) without VVPAT in South Carolina found that every election from 2010-2018 had some memory cards fail. The investigator also found that lists of candidates were different in the central and precinct machines, so 420 votes which were properly cast in the precinct were erroneously added to a different contest in the central official tally, and unknown numbers were added to other contests in the central official tallies. The investigator found the same had happened in 2010. There were also votes lost by garbled transmissions, which the state election commission saw but did not report as an issue. 49 machines reported that their three internal memory counts disagreed, an average of 240 errors per machine, but the machines stayed in use, and the state evaluation did not report the issue, and there were other error codes and time stamp errors.
- In a 2017 York County, Pennsylvania, election, a programming error in a county's machines without VVPAT let voters vote more than once for the same candidate. Some candidates had filed as both Democrat and Republican, so they were listed twice in races where voters could select up to three candidates, so voters could select both instances of the same name. They recounted the DRE machines' electronic records of votes and found 2,904 pairs of double votes.
- In a 2011 Fairfield Township, New Jersey, election a programming error in a machine without a VVPAT gave two candidates low counts. They collected more affidavits by voters who voted for them than the computer tally gave them, so a judge ordered a new election which they won.
- A 2007 study for the Ohio Secretary of State reported on election software from ES&S, Premier and Hart. Besides the problems it found, it noted that all "election systems rely heavily on third party software that implement interfaces to the operating systems, local databases, and devices such as optical scanners... the construction and features of this software is unknown, and may contain undisclosed vulnerabilities such trojan horses or other malware."
- Researchers find security flaws in all election computers, which let voters, staff members or outsiders disrupt or change results, often without detection.
Mechanical voting machines have voters selecting switches (levers), pushing plastic chips through holes, or pushing mechanical buttons which increment a mechanical counter (sometimes called the odometer) for the appropriate candidate.
There is no record of individual votes to check.
Errors in mechanical countingEdit
Tampering with the gears or initial settings can change counts, or gears can stick when a small object is caught in them, so they fail to count some votes. When not maintained well the counters can stick and stop counting additional votes; staff may or may not choose to fix the problem. Also, election staff can read the final results wrong off the back of the machine.
Interpretation, in any counting methodEdit
Election officials or optical scanners decide if a ballot is valid before tallying it. Reasons why it might not be valid include: more choices selected than allowed; incorrect voter signature or details on ballots received by mail, if allowed; lack of poll worker signatures, if required; forged ballot (wrong paper, printing or security features); stray marks which could identify who cast the ballot (to earn payments); and blank ballots, though these may be counted separately as abstentions.
For paper ballots officials decide if the voter's intent is clear, since voters may mark lightly, or circle their choice, instead of marking as instructed. The ballot may be visible to observers to ensure agreement, by webcam or passing around a table, or the process may be private. In the US only Massachusetts and the District of Columbia give anyone but officials a legal right to see ballot marks during hand counting. For optical scans, the software has rules to interpret voter intent, based on the darkness of marks. Software may ignore circles around a candidate name, and paper dust or broken sensors can cause marks to appear or disappear, not where the voter intended.
Officials also check if the number of voters checked in at the polling place matches the number of ballots voted, and that the votes plus remaining unused ballots matches the number of ballots sent to the polling place. If not, they look for the extra ballots, and may report discrepancies.
Secure storage to enable counts in futureEdit
If ballots or other paper or electronic records of an election may be needed for counting or court review after a period of time, they need to be stored securely.
Election storage often uses tamper-evident seals, although seals can typically be removed and reapplied without damage, especially in the first 48 hours. Photos taken when the seal is applied can be compared to photos taken when the seal is opened. Detecting subtle tampering requires substantial training. Election officials usually take too little time to examine seals, and observers are too far away to check seal numbers, though they could compare old and new photos projected on a screen. If seal numbers and photos are kept for later comparison, these numbers and photos need their own secure storage. Seals can also be forged. Seals and locks can be cut so observers cannot trust the storage. If the storage is breached, election results cannot be checked and corrected.
Experienced testers can usually bypass all physical security systems. Locks and cameras are vulnerable before and after delivery. Guards can be bribed or blackmailed. Insider threats and the difficulty of following all security procedures are usually under-appreciated, and most organizations do not want to learn their vulnerabilities.
Security recommendations include preventing access by anyone alone, which would typically require two hard-to-pick locks, and having keys held by independent officials if such officials exist in the jurisdiction; having storage risks identified by people other than those who design or manage the system; and using background checks on staff.
No US state has adequate laws on physical security of the ballots.
Starting the tally soon after voting ends makes it feasible for independent parties to guard storage sites.
Secure transport and internetEdit
The ballots can be carried securely to a central station for central tallying, or they can be tallied at each polling place, manually or by machine, and the results sent securely to the central elections office. Transport is often accompanied by representatives of different parties to ensure honest delivery. Colorado transmits voting records by internet from counties to the Secretary of State, with hash values also sent by internet to try to identify accurate transmissions.
Postal voting is common worldwide, though France stopped it in the 1970s because of concerns about ballot security. Voters who receive a ballot at home may also hand-deliver it or have someone else to deliver it. The voter may be forced or paid to vote a certain way, or ballots may be changed or lost during the delivery process, or delayed so they arrive too late to be counted or for signature mis-matches to be resolved.
Postal voting lowered turnout in California by 3%. It raised turnout in Oregon only in Presidential election years by 4%, turning occasional voters into regular voters, without bringing in new voters. Election offices do not mail to people who have not voted recently, and letter carriers do not deliver to recent movers they do not know, omitting mobile populations.
Some jurisdictions let ballots be sent to the election office by email, fax, internet or app. Email and fax are highly insecure. Internet so far has also been insecure, including in Switzerland, Australia, and Estonia. Apps try to verify the correct voter is using the app by name, date of birth and signature, which are widely available for most voters, so can be faked; or by name, ID and video selfie, which can be faked by loading a pre-recorded video. Apps have been particularly criticized for operating on insecure phones, and pretending to more security during transmission than they have.
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- Zetter, Kim. "Will the Georgia Special Election Get Hacked?". Politico. Retrieved 2020-02-16.
- Freed, Benjamin (2019-01-07). "South Carolina voting machines miscounted hundreds of ballots, report finds". Scoop News Group. Retrieved 2020-02-05.
- Kessler, Brandie, Teresa Boeckel and Dylan Segelbaum; Boeckel, Teresa; Segelbaum, Dylan (2017-11-07). "'Redo' of some York County races - including judge - possible after voting problems". York Daily Record. Retrieved 2020-03-11.
- Lee, Rick (2017-11-20). "UPDATE: York Co. election judicial winners: Kathleen Prendergast, Clyde Vedder, Amber Anstine Kraft". York Daily Record. Retrieved 2020-03-11.
- Thibodeau, Patrick (2016-10-05). "If the election is hacked, we may never know". ComputerWorld. Retrieved 2020-02-18.
- McDaniel; et al. (2007-12-07). EVEREST: Evaluation and Validation of Election-Related Equipment, Standards and Testing (PDF) (Report). Retrieved 2020-02-05.
- Shapiro, Eliza (2012-11-10). "RIP, Lever Voting Machines". The Daily Beast. Retrieved 2020-02-16.
- "Vote: The Machinery of Democracy". Smithsonian Institution. Retrieved 2020-02-16.
- Emspak, Jesse (2016-11-08). "Why Not Paper Ballots? America's Weird History of Voting Machines". livescience.com. Retrieved 2020-02-16.
- "Chapter 3. PHYSICAL SECURITY" (PDF). US Election Assistance Commission. Retrieved April 24, 2018.
- Lindeman, Mark (executive editor), Jennie Bretschneider, Sean Flaherty, Susannah Goodman, Mark Halvorson, Roger Johnston, Ronald L. Rivest, Pam Smith, Philip B. Stark (October 1, 2012). "Risk-Limiting Post-Election Audits: Why and How" (PDF). University of California at Berkeley. pp. 3, 16. Retrieved April 9, 2018.
- Johnston, Roger G., and Jon S. Warner (July 31, 2012). "How to Choose and Use Seals". Army Sustainment. Retrieved May 4, 2018.
- Stark, Philip (July 26, 2018). "An Introduction to Risk-Limiting Audits and Evidence-Based Elections Prepared for the Little Hoover Commission" (PDF). University of California, Berkeley. Retrieved August 16, 2019.
- Coherent Cyber, Freeman, Craft McGregor Group (August 28, 2017). "Security Test Report ES&S Electionware 188.8.131.52" (PDF): 9 – via California Secretary of State. Cite journal requires
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- Stauffer, Jacob (November 4, 2016). "Vulnerability & Security Assessment Report Election Systems &Software's Unity 184.108.40.206" (PDF) – via Freeman, Craft, MacGregor Group for California Secretary of State. Cite journal requires
- Seivold, Garett (April 2, 2018). "Physical Security Threats and Vulnerabilities - LPM". losspreventionmedia.com. Retrieved April 24, 2018.
- There are several sources on lock vulnerabilities:
- Lockpicking is widely taught and practiced: Vanderbilt, Tom (March 12, 2013). "The Strange Things That Happen at a Lock-picking Convention". Slate. Retrieved August 15, 2019.
- Different techniques apply to electronic locks: Menn, Joseph (August 6, 2019). "Exclusive: High-security locks for government and banks hacked by researcher". Reuters. Retrieved August 16, 2019.
- More on electronic locks: Greenberg, Andy (August 29, 2017). "Inside an Epic Hotel Room Hacking Spree". Wired. ISSN 1059-1028. Retrieved August 16, 2019.
- There are no statistics on how often criminals enter rooms undetected, but law enforcement often does so, so ability to enter rooms undetected is widespread: Tien, Lee (October 26, 2014). "Peekaboo, I See You: Government Authority Intended for Terrorism is Used for Other Purposes". Electronic Frontier Foundation. Retrieved August 15, 2019.
- Security camera flaws have been covered extensively:
- Bannister, Adam (October 7, 2016). "How to hack a security camera. It's alarmingly simple". IFSEC Global, Security and Fire News and Resources. Retrieved August 16, 2019.
- Doffman, Zak. "Official Cybersecurity Review Finds U.S. Military Buying High-Risk Chinese Tech (Updated)". Forbes. Retrieved August 14, 2019.
- Schneier, Bruce (October 8, 2007). "Hacking Security Cameras - Schneier on Security". www.schneier.com. Retrieved August 16, 2019.
- Dunn, John (June 11, 2019). "Critical flaws found in Amcrest security cameras". Naked Security. Retrieved August 16, 2019.
- Turner, Karl (November 5, 2007). "Elections board workers take plea deal". Cleveland Plain Dealer. Retrieved August 17, 2019.
- Recount Now (January 11, 2017). "Report on the 2016 Presidential Recount in Clark County, Nevada. Page 20" (PDF). Internet Archive. Retrieved August 17, 2019.
- "Principles and Best Practices for Post-Election Tabulation Audits" (PDF). ElectionAudits.org. 2018. Retrieved August 12, 2019.
- Benaloh, Public Evidence from Secret Ballots; et al. (2017). Electronic voting : second International Joint Conference, E-Vote-ID 2017, Bregenz, Austria, October 24–27, 2017, proceedings. Cham, Switzerland. p. 122. ISBN 9783319686875. OCLC 1006721597.
- Organisation for Security and Cooperation in Europe (OSCE) policy calls for independent foreign officials to sleep with ballots, and allows parties to do so:
- International Crisis Group (ICG) (September 10, 1997). "Municipal Elections in Bosnia and Herzegovina". RefWorld. Retrieved August 12, 2019.
- "OHR SRT News Summary, September 7, 1998". Office of the High Representative (Bosnia+Herzegovina). September 7, 1998. Retrieved August 12, 2019.
- "Turkey's opposition sleeping beside ballots to safeguard democracy". Ahval. April 4, 2019. Retrieved August 12, 2019.
- Gall, Carlotta (April 1, 2019). "A Political Quake in Turkey as Erdogan's Party Loses in His Home Base of Support". The New York Times. ISSN 0362-4331. Retrieved August 12, 2019.
- Cobb, Sue (2016-10-17). "The 2000 Presidential Election – The Florida Recount". Association for Diplomatic Studies & Training. Retrieved 2020-03-11.
- Baker, Deborah (2004-10-31). "ABQjournal: Contentious 2000 Election Closest in N.M. History". Albuquerque Journal. Retrieved 2020-03-11.
- "Rule 25. Post-election audit" (PDF). Colorado Secretary of State. Retrieved 2020-02-18.
- "Judge upholds vote-rigging claims". BBC. 2005-04-04. Retrieved 2020-02-18.
- Mawrey, Richard (2010-11-01). "Judgment of Commissioner Mawrey QC Handed down on Monday 4th April 2005 in the matters of Local Government elections for the Bordesley Green and Aston Wards of the Birmingham City Council both held on 10th June 2004". web.archive.org. Retrieved 2020-02-18.
- "Thousands of mailed ballots in Florida were not counted". NBC News. Retrieved 2019-03-27.
- "If you vote by mail in Florida, it's 10 times more likely that ballot won't count". miamiherald. Retrieved 2019-03-27.
- Kousser, thad, and Megan Mullin (2007-07-13). "Does Voting by Mail Increase Participation? Using Matching to Analyze a Natural Experiment" (PDF). Political Analysis doi:10.1093/pan/mpm014. Retrieved 2020-02-18.
- BERINSKY, ADAM J., and NANCY BURNS MICHAEL W. TRAUGOTT (2001). "WHO VOTES BY MAIL? A DYNAMIC MODEL OF THE INDIVIDUALLEVEL CONSEQUENCES OF VOTING-BY-MAIL SYSTEMS" (PDF). Public Opinion Quarterly Volume 65:178–197. Retrieved 2020-02-18.
- Slater, Michael, and Teresa James (2007-06-29). "Vote-by-Mail Doesn't Deliver". NonprofitVote.org. Retrieved 2020-02-18.
- "Electronic Transmission of Ballots". National Conference of State Legislatures. Retrieved 2020-02-18.
- Jefferson, David. "What About Email and Fax?". Verified Voting. Retrieved 2020-02-18.
- Zetter, Kim (2019-02-21). "Experts Find Serious Problems With Switzerland's Online Voting System". Vice. Retrieved 2020-02-18.
- Porup, J. M. (2018-05-02). "Online voting is impossible to secure. So why are some governments using it?". CSO. Retrieved 2020-02-18.
- "Independent Report on E-voting in Estonia - A security analysis of Estonia's Internet voting system by international e-voting experts". Retrieved 2020-02-18.
- Parks, Miles (2020-01-22). "Exclusive: Seattle-Area Voters To Vote By Smartphone In 1st For U.S. Elections". NPR. Retrieved 2020-02-18.
- Jefferson, David (2019-05-01). "What We Don't Know About the Voatz "Blockchain" Internet Voting System" (PDF). University of South Carolina. Retrieved 2020-02-18.
- Zetter, Kim (2020-02-13). "'Sloppy' Mobile Voting App Used in Four States Has 'Elementary' Security Flaws". Vice. Retrieved 2020-02-18.
- Specter, Michael A., James Koppel, Daniel Weitzner (2020-02-12). "The Ballot is Busted Before the Blockchain: A Security Analysis of Voatz, the First Internet Voting Application Used in U.S. Federal Elections" (PDF). MIT. Retrieved 2020-02-18.
- The Election Technology Library research list - A comprehensive list of research relating to technology use in elections.
- E-Voting information from ACE Project
- AEI-Brookings Election Reform Project
- Electronic Voting Systems at Curlie
- Voting and Elections by Douglas W. Jones: Thorough articles about the history and problems with Voting Machinery
- Selker, Ted Scientific American Magazine Fixing the Vote October 2004
- The Machinery of Democracy: Voting System Security, Accessibility, Usability, and Cost from Brennan Center for Justice at NYU School of Law
- An index of articles on vote counting from the ACE Project guide to designing and administering elections