There are a variety of ways to electronically register,
store, and process votes. In recent years older manual systems (paper ballots
or mechanical voting machines) have been replaced in many areas with systems
ranging from purely digital (touch screens) to hybrid systems where marked
paper ballots are scanned and tabulated by machine. How-ever, voting systems
have been subject to considerable con-troversy, particularly following the
Florida debacle in the 2000 U.S. presidential election.
The criteria by which
voting systems are evaluated include:
• how easy it is
for the voter to understand and use the system
• accessibility for disabled persons
• whether the voter’s intentions are accurately
recorded
There are several types of electronic voting systems, such as this box that
automatically tallies specially marked ballots. Common concerns include the
potential for tampering and the need to provide for inde-pendent verification
of results. (Lisa McDonald/istockphoto)
• the ability to make a permanent record of the
vote
• prevention of tampering (physical or
electronic)
• provisions for
independent auditing of the votes in case of dispute
The degree to which a
given system meets these criteria can vary considerably because of both design
and imple-mentation issues.
Early Systems
The earliest form of voting system consisted of paper
ballots marked and tabulated entirely by hand. The first generation of
“automatic” voting systems involved mechanical voting machines (where votes
were registered by pulling levers). Next came two types of hybrid systems where
votes were cast mechanically but tabulated automatically. These sys-tems used
punch cards (see punched cards and paper tape) or “marksense” or similar systems where the voter filled in little squares and the ballots were
then scanned and tabulated automatically.
The ultraclose and
highly disputed 2000 U.S. presiden-tial election “stress-tested” voting systems
that most people had previously believed were reasonably accurate. The
prin-cipal problems were the interpretation of punch cards that were not
properly punched through (so-called dimpled or hanging chads) and the fact that
some ballot layouts proved to be confusing or ambiguous. Two types of voting
systems have been proposed as replacements for the problematic earlier
technology.
Touchscreen
This type of system uses a screen display that can be
directly manipulated by the voter (see touchscreen). In the most common type, called DRE (direct-recording
elec-tronic), a computer program interprets and tabulates the vote as it is
cast, storing an image in a removable memory unit and (usually) printing out a
copy for backup. After vot-ing is complete, the memory module can be sent to
the cen-tral counting office. (Alternatively, votes can be transmitted over a
computer network in batches throughout the day.) In a few cases, voting has
also been implemented through secure Internet sites.
Optical Scan
Concern about potential tampering with computers has led
many jurisdictions to begin to replace touchscreen systems with optical-scan
systems, where the voter marks a sturdy paper ballot. (About half of U.S.
counties now use opti-cal-scan systems.) The advantage of optical systems is
that the voter physically marks the ballot and can see how he or she has voted,
and after tabulation the physical ballots are available for review in case of
problems. However, opti-cal-scan ballots must be properly marked using the
correct type of pencil, or they may not be read correctly. Unlike the
touchscreen, it is not possible to give the voter immediate feedback so that
any errors can be corrected. Optical-ballot systems may cost more because of
paper and printing costs for the ballots, which may have to be prepared in
several languages. However this cost may be offset by not having to develop or
validate the more complicated software needed for all-electronic systems.
Whatever system is used,
federal law requires that visu-ally or otherwise disabled persons be given the
opportu-nity, wherever possible, to cast their own vote in privacy. With
optical-scan ballots, this is accommodated with a spe-cial device that plays an
audio file listing the candidates for each race, with the voter pressing a
button to mark the choice. However, disability rights advocates have
com-plained that existing systems still require that another per-son physically
insert the marked ballot into the scanner. Touchscreen systems, however, with
the aid of audio cues, can be used by visually disabled persons without the
need for another person to be present. They are thus preferred by some
advocates for the disabled.
Reforms and Issues
In response to the problems with the 2000
election, Con-gress passed the Help America Vote Act in 2002. Since then, the
federal government has spent more than $3 billion to help states replace older
voting systems—in many cases with touchscreen systems.
The biggest concern
raised about electronic voting sys-tems is that they, like other computer
systems, may be sus-ceptible to hacking or manipulation by dishonest officials.
In 2007 teams of researchers at the University of Califor-nia–Davis were
invited by the state to try to hack into its voting systems. For the test, the
researchers were provided with full access to the source code and documentation
for the systems, as well as physical access. The hacking teams were able to
break into and compromise every type of vot-ing system tested. In their report,
the researchers outlined what they claimed to be surprisingly weak electronic
and physical security, including flaws that could allow hackers to introduce
computer viruses and take over control of the systems.
Manufacturers and other
defenders of the technology have argued that the testing was unrealistic and
that real-world hackers would not have had nearly as much informa-tion about or
access to the systems. (This may underestimate the resourcefulness of hackers,
as shown with other sys-tems, such as the phone system and computer networks.)
Another issue is who
will be responsible for indepen-dently reviewing the programming (source) code
for each system to verify that it does not contain flaws. Manufactur-ers
generally resist such review, considering the source code to be proprietary. (A
possible alternative might be an open-source voting system. Advocates of
open-source software argue that it is safer precisely because it is open to
scrutiny and testing—see open-source movement.)
One common response to
these security concerns is to require that all systems generate paper records
that can be verified and audited. Some defenders of existing technol-ogy say
that adding a parallel paper system is unnecessarily expensive and introduces
other problems such as printer failures. They argue that all-electronic systems
can be made safer and more secure, such as through the use of encryp-tion. (A
proposed compromise would be for the machine to
print out a simple receipt with a code that the
voter could use to verify online that the vote was tabulated.)
As of 2007, 28 states
had passed laws requiring that vot-ing systems produce some sort of paper
receipt or record that shows the voter what has been voted and that can be used
later for an independent audit or recount,
Although control of
elections is primarily a state or local responsibility, the federal government
does have jurisdic-tion over elections for federal office. As a practical
matter, any changes in voting technology or procedures mandated by Congress for
federal elections will end up being used in local elections as well.
In 2007, congressional
leaders decided not to require a major overhaul of the nation’s election
systems until at least 2012. However, the inclusion of some sort of paper
record is being mandated for the 2008 election. For users of touch-screen
systems, the simplest way to accommodate this is to add small paper-spool
printers, but some states have com-plained that their systems would require
more-expensive accommodations.
Meanwhile, a lively
debate continues in many states and other jurisdictions about how to meet the
need for accessi-ble but secure voting systems without breaking the budget.