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New Delhi, Feb 20: Microsoft has begun testing its free open-source software called "ElectionGuard" in a small Wisconsin town in the US that aims to make voting more secure, verifiable and efficient.

"ElectionGuard" will enable end-to-end verification of elections, open results to third-party organisations for secure validation, and allow individual voters to confirm their votes were correctly counted.

It enables government entities, news outlets, human rights organisations or anyone else to build additional verifiers that independently can certify election results have been accurately counted and have not been altered, according to the company.

The software would create a paper trail and assure voters their votes were properly tallied.

"On Tuesday, Fulton residents are using the technology while choosing who will join the local school board and hold a seat on Wisconsin's state Supreme Court," reports CNBC.

With the test, the company aims to see if voters like the experience and make sure everything works fine.

In May last year, Microsoft CEO Satya Nadella announced "ElectionGuard".

According to Tom Burt, Corporate Vice President, Customer Security and Trust, voting system manufacturers will be free to build ElectionGuard into their systems in a variety of ways.

"These are exciting steps that enable individual voters to confirm their vote was properly counted, and assures those voters using an ElectionGuard system of the most secure and trustworthy vote in the history of the US," Burt said in a recent blog post.

"ElectionGuard" is not intended to replace paper ballots but rather to supplement and improve systems that rely on them, and it is not designed to support internet voting.

The software provides each voter a tracker with a unique code that can be used to follow an encrypted version of the vote through the entire election process via a web portal provided by election authorities.

During the process of vote-casting, voters have an optional step that allows them to confirm that their trackers and encrypted votes accurately reflect their selections.

But once a vote is cast, neither the tracker nor any data provided through the web portal can be used to reveal the contents of the vote.

After the election is complete, the tracker codes can be used by voters to confirm that their votes were not altered or tampered with and that they were properly counted, said Microsoft.

On the security front, "ElectionGuard" uses something called homomorphic encryption - which enables mathematical procedures "like counting - to be done with fully encrypted data".

The current physical distancing guidelines provided by the World Health Organisation (WHO) and by the US Centers for Disease Control and Prevention (CDC) may not be adequate to curb the coronavirus spread, according to a research which says the gas cloud from a cough or sneeze may help virus particles travel up to 8 metres. The research, published in the Journal of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.

Study author, MIT associate professor Lydia Bourouiba, warned that droplets of all sizes can travel 23 to 27 feet, or 7-8 metres, carrying the pathogen.

According to Bourouiba, the current guidelines are based on "arbitrary" assumptions of droplet size, "overly simplified", and "may limit the effectiveness of the proposed interventions" against the deadly pandemic.

 She explained that the old guidelines assume droplets to be one of two categories, small or large, taking short-range semi-ballistic trajectories when a person exhales, coughs, or sneezes.

However based on more recent discoveries, the MIT scientist said, sneezes and coughs are made of a puff cloud that carries ambient air, transporting within it clusters of droplets of a wide range of sizes.

Bourouiba warned that this puff cloud, with ambient air entrapped in it, can offer the droplets moisture and warmth that can prevent it from evaporation in the outer environment.

"The locally moist and warm atmosphere within the turbulent gas cloud allows the contained droplets to evade evaporation for much longer than occurs with isolated droplets," she said.

"Under these conditions, the lifetime of a droplet could be considerably extended by a factor of up to 1000, from a fraction of a second to minutes," the researcher explained in the study.

The MIT scientist, who has researched the dynamics of coughs and sneezes for years, added that these droplets settle along the trajectory of a cough or sneeze contaminating surfaces, with their residues staying suspended in the air for hours.

"Even when maximum containment policies were enforced, the rapid international spread of COVID-19 suggests that using arbitrary droplet size cutoffs may not accurately reflect what actually occurs with respiratory emissions, possibly contributing to the ineffectiveness of some procedures used to limit the spread of respiratory disease," Bourouiba wrote in the study